Traitement efficace des structures de texte complexes dans les documents avec 50 lignes d'expressions régulières
Xiao Han, PDG de Jina, a partagé sur GitHub un extrait de code impressionnant de l'implémentation principale du chunking utilisée dans le tokenizer de Jina. L'extrait de code d'expression régulière ne fait qu'une cinquantaine de lignes, mais il gère efficacement le découpage de contenus textuels de toutes complexités. Les performances sont étonnamment robustes.
Expérience en ligne : https://jina.ai/tokenizer/
// Updated: Aug. 15, 2024
// Run: node testRegex.js testText.txt
// Used in https://jina.ai/tokenizer
const fs = require('fs');
const util = require('util');
// Define variables for magic numbers
const MAX_HEADING_LENGTH = 7;
const MAX_HEADING_CONTENT_LENGTH = 200;
const MAX_HEADING_UNDERLINE_LENGTH = 200;
const MAX_HTML_HEADING_ATTRIBUTES_LENGTH = 100;
const MAX_LIST_ITEM_LENGTH = 200;
const MAX_NESTED_LIST_ITEMS = 6;
const MAX_LIST_INDENT_SPACES = 7;
const MAX_BLOCKQUOTE_LINE_LENGTH = 200;
const MAX_BLOCKQUOTE_LINES = 15;
const MAX_CODE_BLOCK_LENGTH = 1500;
const MAX_CODE_LANGUAGE_LENGTH = 20;
const MAX_INDENTED_CODE_LINES = 20;
const MAX_TABLE_CELL_LENGTH = 200;
const MAX_TABLE_ROWS = 20;
const MAX_HTML_TABLE_LENGTH = 2000;
const MIN_HORIZONTAL_RULE_LENGTH = 3;
const MAX_SENTENCE_LENGTH = 400;
const MAX_QUOTED_TEXT_LENGTH = 300;
const MAX_PARENTHETICAL_CONTENT_LENGTH = 200;
const MAX_NESTED_PARENTHESES = 5;
const MAX_MATH_INLINE_LENGTH = 100;
const MAX_MATH_BLOCK_LENGTH = 500;
const MAX_PARAGRAPH_LENGTH = 1000;
const MAX_STANDALONE_LINE_LENGTH = 800;
const MAX_HTML_TAG_ATTRIBUTES_LENGTH = 100;
const MAX_HTML_TAG_CONTENT_LENGTH = 1000;
const LOOKAHEAD_RANGE = 100; // Number of characters to look ahead for a sentence boundary
// Define the regex pattern
// Headings
// Citations
// List items
// Block quotes
// Code blocks
// Tables
// Horizontal rules
// Standalone lines or phrases
// Sentences or phrases
// Quoted text, parenthetical phrases, or bracketed content
// Paragraphs
// HTML-like tags and their content
// LaTeX-style math expressions
// Fallback for any remaining content
// Read the regex and test text from files
const chunkRegex = new RegExp(
"(" +
// 1. Headings (Setext-style, Markdown, and HTML-style, with length constraints)
`(?:^(?:[#*=-]{1,${MAX_HEADING_LENGTH}}|\\w[^\\r\\n]{0,${MAX_HEADING_CONTENT_LENGTH}}\\r?\\n[-=]{2,${MAX_HEADING_UNDERLINE_LENGTH}}|<h[1-6][^>]{0,${MAX_HTML_HEADING_ATTRIBUTES_LENGTH}}>)[^\\r\\n]{1,${MAX_HEADING_CONTENT_LENGTH}}(?:</h[1-6]>)?(?:\\r?\\n|$))` +
"|" +
// New pattern for citations
`(?:\\[[0-9]+\\][^\\r\\n]{1,${MAX_STANDALONE_LINE_LENGTH}})` +
"|" +
// 2. List items (bulleted, numbered, lettered, or task lists, including nested, up to three levels, with length constraints)
`(?:(?:^|\\r?\\n)[ \\t]{0,3}(?:[-*+•]|\\d{1,3}\\.\\w\\.|\\[[ xX]\\])[ \\t]+(?:(?:\\b[^\\r\\n]{1,${MAX_LIST_ITEM_LENGTH}}\\b(?:[.!?…]|\\.{3}|[\\u2026\\u2047-\\u2049]|[\\p{Emoji_Presentation}\\p{Extended_Pictographic}])(?=\\s|$))|(?:\\b[^\\r\\n]{1,${MAX_LIST_ITEM_LENGTH}}\\b(?=[\\r\\n]|$))|(?:\\b[^\\r\\n]{1,${MAX_LIST_ITEM_LENGTH}}\\b(?=[.!?…]|\\.{3}|[\\u2026\\u2047-\\u2049]|[\\p{Emoji_Presentation}\\p{Extended_Pictographic}])(?:.{1,${LOOKAHEAD_RANGE}}(?:[.!?…]|\\.{3}|[\\u2026\\u2047-\\u2049]|[\\p{Emoji_Presentation}\\p{Extended_Pictographic}])(?=\\s|$))?))` +
`(?:(?:\\r?\\n[ \\t]{2,5}(?:[-*+•]|\\d{1,3}\\.\\w\\.|\\[[ xX]\\])[ \\t]+(?:(?:\\b[^\\r\\n]{1,${MAX_LIST_ITEM_LENGTH}}\\b(?:[.!?…]|\\.{3}|[\\u2026\\u2047-\\u2049]|[\\p{Emoji_Presentation}\\p{Extended_Pictographic}])(?=\\s|$))|(?:\\b[^\\r\\n]{1,${MAX_LIST_ITEM_LENGTH}}\\b(?=[\\r\\n]|$))|(?:\\b[^\\r\\n]{1,${MAX_LIST_ITEM_LENGTH}}\\b(?=[.!?…]|\\.{3}|[\\u2026\\u2047-\\u2049]|[\\p{Emoji_Presentation}\\p{Extended_Pictographic}])(?:.{1,${LOOKAHEAD_RANGE}}(?:[.!?…]|\\.{3}|[\\u2026\\u2047-\\u2049]|[\\p{Emoji_Presentation}\\p{Extended_Pictographic}])(?=\\s|$))?)))` +
`{0,${MAX_NESTED_LIST_ITEMS}}(?:\\r?\\n[ \\t]{4,${MAX_LIST_INDENT_SPACES}}(?:[-*+•]|\\d{1,3}\\.\\w\\.|\\[[ xX]\\])[ \\t]+(?:(?:\\b[^\\r\\n]{1,${MAX_LIST_ITEM_LENGTH}}\\b(?:[.!?…]|\\.{3}|[\\u2026\\u2047-\\u2049]|[\\p{Emoji_Presentation}\\p{Extended_Pictographic}])(?=\\s|$))|(?:\\b[^\\r\\n]{1,${MAX_LIST_ITEM_LENGTH}}\\b(?=[\\r\\n]|$))|(?:\\b[^\\r\\n]{1,${MAX_LIST_ITEM_LENGTH}}\\b(?=[.!?…]|\\.{3}|[\\u2026\\u2047-\\u2049]|[\\p{Emoji_Presentation}\\p{Extended_Pictographic}])(?:.{1,${LOOKAHEAD_RANGE}}(?:[.!?…]|\\.{3}|[\\u2026\\u2047-\\u2049]|[\\p{Emoji_Presentation}\\p{Extended_Pictographic}])(?=\\s|$))?)))` +
`{0,${MAX_NESTED_LIST_ITEMS}})?)` +
"|" +
// 3. Block quotes (including nested quotes and citations, up to three levels, with length constraints)
`(?:(?:^>(?:>|\\s{2,}){0,2}(?:(?:\\b[^\\r\\n]{0,${MAX_BLOCKQUOTE_LINE_LENGTH}}\\b(?:[.!?…]|\\.{3}|[\\u2026\\u2047-\\u2049]|[\\p{Emoji_Presentation}\\p{Extended_Pictographic}])(?=\\s|$))|(?:\\b[^\\r\\n]{0,${MAX_BLOCKQUOTE_LINE_LENGTH}}\\b(?=[\\r\\n]|$))|(?:\\b[^\\r\\n]{0,${MAX_BLOCKQUOTE_LINE_LENGTH}}\\b(?=[.!?…]|\\.{3}|[\\u2026\\u2047-\\u2049]|[\\p{Emoji_Presentation}\\p{Extended_Pictographic}])(?:.{1,${LOOKAHEAD_RANGE}}(?:[.!?…]|\\.{3}|[\\u2026\\u2047-\\u2049]|[\\p{Emoji_Presentation}\\p{Extended_Pictographic}])(?=\\s|$))?))\\r?\\n?){1,${MAX_BLOCKQUOTE_LINES}})` +
"|" +
// 4. Code blocks (fenced, indented, or HTML pre/code tags, with length constraints)
`(?:(?:^|\\r?\\n)(?:\`\`\`|~~~)(?:\\w{0,${MAX_CODE_LANGUAGE_LENGTH}})?\\r?\\n[\\s\\S]{0,${MAX_CODE_BLOCK_LENGTH}}?(?:\`\`\`|~~~)\\r?\\n?` +
`|(?:(?:^|\\r?\\n)(?: {4}|\\t)[^\\r\\n]{0,${MAX_LIST_ITEM_LENGTH}}(?:\\r?\\n(?: {4}|\\t)[^\\r\\n]{0,${MAX_LIST_ITEM_LENGTH}}){0,${MAX_INDENTED_CODE_LINES}}\\r?\\n?)` +
`|(?:<pre>(?:<code>)?[\\s\\S]{0,${MAX_CODE_BLOCK_LENGTH}}?(?:</code>)?</pre>))` +
"|" +
// 5. Tables (Markdown, grid tables, and HTML tables, with length constraints)
`(?:(?:^|\\r?\\n)(?:\\|[^\\r\\n]{0,${MAX_TABLE_CELL_LENGTH}}\\|(?:\\r?\\n\\|[-:]{1,${MAX_TABLE_CELL_LENGTH}}\\|){0,1}(?:\\r?\\n\\|[^\\r\\n]{0,${MAX_TABLE_CELL_LENGTH}}\\|){0,${MAX_TABLE_ROWS}}` +
`|<table>[\\s\\S]{0,${MAX_HTML_TABLE_LENGTH}}?</table>))` +
"|" +
// 6. Horizontal rules (Markdown and HTML hr tag)
`(?:^(?:[-*_]){${MIN_HORIZONTAL_RULE_LENGTH},}\\s*$|<hr\\s*/?>)` +
"|" +
// 10. Standalone lines or phrases (including single-line blocks and HTML elements, with length constraints)
`(?:^(?:<[a-zA-Z][^>]{0,${MAX_HTML_TAG_ATTRIBUTES_LENGTH}}>)?(?:(?:[^\\r\\n]{1,${MAX_STANDALONE_LINE_LENGTH}}(?:[.!?…]|\\.\\.\\.|[\\u2026\\u2047-\\u2049]|[\\p{Emoji_Presentation}\\p{Extended_Pictographic}])(?=\\s|$))|(?:[^\\r\\n]{1,${MAX_STANDALONE_LINE_LENGTH}}(?=[\\r\\n]|$))|(?:[^\\r\\n]{1,${MAX_STANDALONE_LINE_LENGTH}}(?=[.!?…]|\\.\\.\\.|[\\u2026\\u2047-\\u2049]|[\\p{Emoji_Presentation}\\p{Extended_Pictographic}])(?:.{1,${LOOKAHEAD_RANGE}}(?:[.!?…]|\\.\\.\\.|[\\u2026\\u2047-\\u2049]|[\\p{Emoji_Presentation}\\p{Extended_Pictographic}])(?=\\s|$))?))(?:</[a-zA-Z]+>)?(?:\\r?\\n|$))` +
"|" +
// 7. Sentences or phrases ending with punctuation (including ellipsis and Unicode punctuation)
`(?:(?:[^\\r\\n]{1,${MAX_SENTENCE_LENGTH}}(?:[.!?…]|\\.\\.\\.|[\\u2026\\u2047-\\u2049]|[\\p{Emoji_Presentation}\\p{Extended_Pictographic}])(?=\\s|$))|(?:[^\\r\\n]{1,${MAX_SENTENCE_LENGTH}}(?=[\\r\\n]|$))|(?:[^\\r\\n]{1,${MAX_SENTENCE_LENGTH}}(?=[.!?…]|\\.\\.\\.|[\\u2026\\u2047-\\u2049]|[\\p{Emoji_Presentation}\\p{Extended_Pictographic}])(?:.{1,${LOOKAHEAD_RANGE}}(?:[.!?…]|\\.\\.\\.|[\\u2026\\u2047-\\u2049]|[\\p{Emoji_Presentation}\\p{Extended_Pictographic}])(?=\\s|$))?))` +
"|" +
// 8. Quoted text, parenthetical phrases, or bracketed content (with length constraints)
"(?:" +
`(?<!\\w)\"\"\"[^\"]{0,${MAX_QUOTED_TEXT_LENGTH}}\"\"\"(?!\\w)` +
`|(?<!\\w)(?:['\"\`'"])[^\\r\\n]{0,${MAX_QUOTED_TEXT_LENGTH}}\\1(?!\\w)` +
`|\\([^\\r\\n()]{0,${MAX_PARENTHETICAL_CONTENT_LENGTH}}(?:\\([^\\r\\n()]{0,${MAX_PARENTHETICAL_CONTENT_LENGTH}}\\)[^\\r\\n()]{0,${MAX_PARENTHETICAL_CONTENT_LENGTH}}){0,${MAX_NESTED_PARENTHESES}}\\)` +
`|\\[[^\\r\\n\\[\\]]{0,${MAX_PARENTHETICAL_CONTENT_LENGTH}}(?:\\[[^\\r\\n\\[\\]]{0,${MAX_PARENTHETICAL_CONTENT_LENGTH}}\\][^\\r\\n\\[\\]]{0,${MAX_PARENTHETICAL_CONTENT_LENGTH}}){0,${MAX_NESTED_PARENTHESES}}\\]` +
`|\\$[^\\r\\n$]{0,${MAX_MATH_INLINE_LENGTH}}\\$` +
`|\`[^\`\\r\\n]{0,${MAX_MATH_INLINE_LENGTH}}\`` +
")" +
"|" +
// 9. Paragraphs (with length constraints)
`(?:(?:^|\\r?\\n\\r?\\n)(?:<p>)?(?:(?:[^\\r\\n]{1,${MAX_PARAGRAPH_LENGTH}}(?:[.!?…]|\\.{3}|[\\u2026\\u2047-\\u2049]|[\\p{Emoji_Presentation}\\p{Extended_Pictographic}])(?=\\s|$))|(?:[^\\r\\n]{1,${MAX_PARAGRAPH_LENGTH}}(?=[\\r\\n]|$))|(?:[^\\r\\n]{1,${MAX_PARAGRAPH_LENGTH}}(?=[.!?…]|\\.{3}|[\\u2026\\u2047-\\u2049]|[\\p{Emoji_Presentation}\\p{Extended_Pictographic}])(?:.{1,${LOOKAHEAD_RANGE}}(?:[.!?…]|\\.{3}|[\\u2026\\u2047-\\u2049]|[\\p{Emoji_Presentation}\\p{Extended_Pictographic}])(?=\\s|$))?))(?:</p>)?(?=\\r?\\n\\r?\\n|$))` +
"|" +
// 11. HTML-like tags and their content (including self-closing tags and attributes, with length constraints)
`(?:<[a-zA-Z][^>]{0,${MAX_HTML_TAG_ATTRIBUTES_LENGTH}}(?:>[\\s\\S]{0,${MAX_HTML_TAG_CONTENT_LENGTH}}?</[a-zA-Z]+>|\\s*/>))` +
"|" +
// 12. LaTeX-style math expressions (inline and block, with length constraints)
`(?:(?:\\$\\$[\\s\\S]{0,${MAX_MATH_BLOCK_LENGTH}}?\\$\\$)|(?:\\$[^\\$\\r\\n]{0,${MAX_MATH_INLINE_LENGTH}}\\$))` +
"|" +
// 14. Fallback for any remaining content (with length constraints)
`(?:(?:[^\\r\\n]{1,${MAX_STANDALONE_LINE_LENGTH}}(?:[.!?…]|\\.{3}|[\\u2026\\u2047-\\u2049]|[\\p{Emoji_Presentation}\\p{Extended_Pictographic}])(?=\\s|$))|(?:[^\\r\\n]{1,${MAX_STANDALONE_LINE_LENGTH}}(?=[\\r\\n]|$))|(?:[^\\r\\n]{1,${MAX_STANDALONE_LINE_LENGTH}}(?=[.!?…]|\\.{3}|[\\u2026\\u2047-\\u2049]|[\\p{Emoji_Presentation}\\p{Extended_Pictographic}])(?:.{1,${LOOKAHEAD_RANGE}}(?:[.!?…]|\\.{3}|[\\u2026\\u2047-\\u2049]|[\\p{Emoji_Presentation}\\p{Extended_Pictographic}])(?=\\s|$))?))` +
")",
"gmu"
);
// read from the arg[1] file
const testText = fs.readFileSync(process.argv[2], 'utf8');
// Function to format bytes to a human-readable string
function formatBytes(bytes) {
if (bytes < 1024) return bytes + " bytes";
else if (bytes < 1048576) return (bytes / 1024).toFixed(2) + " KB";
else if (bytes < 1073741824) return (bytes / 1048576).toFixed(2) + " MB";
else return (bytes / 1073741824).toFixed(2) + " GB";
}
// Start measuring time and memory
const startTime = process.hrtime();
const startMemory = process.memoryUsage().heapUsed;
// Apply the regex
const matches = testText.match(chunkRegex);
// End measuring time and memory
const endTime = process.hrtime(startTime);
const endMemory = process.memoryUsage().heapUsed;
// Calculate execution time and memory usage
const executionTime = endTime[0] + endTime[1] / 1e9;
const memoryUsed = endMemory - startMemory;
// Output results
console.log(`Number of chunks: ${matches ? matches.length : 0}`);
console.log(`Execution time: ${executionTime.toFixed(3)} seconds`);
console.log(`Memory used: ${formatBytes(memoryUsed)}`);
// Output the first 5 matches (or fewer if there are less than 5)
console.log('\nFirst 10 chunks:');
if (matches) {
matches.slice(0, 100).forEach((match, index) => {
console.log(util.inspect(match, {maxStringLength: 50}));
});
} else {
console.log('No chunks found.');
}
// Output regex flags
console.log(`\nRegex flags: ${chunkRegex.flags}`);
// Check for potential issues
if (executionTime > 5) {
console.warn('\nWarning: Execution time exceeded 5 seconds. The regex might be too complex or the input too large.');
}
if (memoryUsed > 100 * 1024 * 1024) {
console.warn('\nWarning: Memory usage exceeded 100 MB. Consider processing the input in smaller chunks.');
}
Les expressions régulières de ce code prennent en compte une variété de structures de texte, y compris les titres, les éléments de liste, les références de blocs, les blocs de code, les tableaux, les règles horizontales, les lignes ou phrases séparées, les phrases ou expressions avec ponctuation, le texte cité, le contenu des parenthèses, les blocs de code, les tableaux, les règles horizontales, les lignes ou phrases séparées, le contenu des balises HTML, les expressions mathématiques LaTeX, et bien plus encore. Il se rapproche du découpage de texte grâce à des modèles soigneusement conçus, bien que les expressions régulières elles-mêmes ne comprennent pas le contexte ou la sémantique du texte.
L'expression régulière dans l'exemple de code utilise le "backtracking", qui est essentiel pour une segmentation sémantique plus significative. Par exemple, elle ne s'interrompt pas au milieu d'une phrase. Toutefois, pour les listes profondément imbriquées, les références de blocs ou les structures telles que les parenthèses, le retour en arrière peut s'avérer difficile. Pour optimiser ces cas, les expressions régulières peuvent être améliorées pour mieux gérer les niveaux d'imbrication multiples et limiter l'imbrication à des niveaux pratiques, par exemple jusqu'à 3 niveaux, afin de garantir les performances et d'éviter les retours en arrière catastrophiques.
Bien que ce code ne soit peut-être pas très complet, mais conformément à cette idée d'optimiser les détails, nous pouvons prévoir que l'effet peut encore être amélioré. Les services cloud officiels de Jina sont fournis par l'interface du participe officiel pour que les développeurs puissent en expérimenter l'utilisation, et ils sont gratuits.
version de python
"""
// 1. Headings (Setext-style, Markdown, and HTML-style, with length constraints)
`(?:^(?:[#*=-]{1,${MAX_HEADING_LENGTH}}|\\w[^\\r\\n]{0,${MAX_HEADING_CONTENT_LENGTH}}\\r?\\n[-=]{2,${MAX_HEADING_UNDERLINE_LENGTH}}|<h[1-6][^>]{0,${MAX_HTML_HEADING_ATTRIBUTES_LENGTH}}>)[^\\r\\n]{1,${MAX_HEADING_CONTENT_LENGTH}}(?:</h[1-6]>)?(?:\\r?\\n|$))` +
"|" +
// New pattern for citations
`(?:\\[[0-9]+\\][^\\r\\n]{1,${MAX_STANDALONE_LINE_LENGTH}})` +
"""
heading_regex = regex.compile(
# 1. Headings (Setext-style, Markdown, and HTML-style, with length constraints)
rf"(?:^" # 开始匹配行的开头
rf"(?:^(?:[#*=-]{{1,{MAX_HEADING_LENGTH}}}" # Markdown 风格的标题
rf"|\w[^\r\n]{{0,{MAX_HEADING_CONTENT_LENGTH}}}\r?\n[-=]{{2,{MAX_HEADING_UNDERLINE_LENGTH}}}" # Setext 风格的标题
rf"|<h[1-6][^>]{{0,{MAX_HTML_HEADING_ATTRIBUTES_LENGTH}}}>[^\r\n]{{1,{MAX_HEADING_CONTENT_LENGTH}}}" # HTML 风格的标题
rf")"
rf"[^\r\n]{{1,{MAX_HEADING_CONTENT_LENGTH}}})" # 匹配标题内容
rf"(?:</h[1-6]>)?" # 可选的闭合标签
rf"(?:\r?\n|$)" # 行尾匹配
rf")"
rf"|"
rf"(?:\[[0-9]+\][^\r\n]{{1,{MAX_STANDALONE_LINE_LENGTH}}})"
,
regex.MULTILINE | regex.UNICODE
)
"""
// 2. List items (bulleted, numbered, lettered, or task lists, including nested, up to three levels, with length constraints)
`(?:(?:^|\\r?\\n)[ \\t]{0,3}(?:[-*+•]|\\d{1,3}\\.\\w\\.|\\[[ xX]\\])[ \\t]+
(?:(?:\\b[^\\r\\n]{1,${MAX_LIST_ITEM_LENGTH}}\\b(?:[.!?…]|\\.{3}|[\\u2026\\u2047-\\u2049]|
[\\p{Emoji_Presentation}\\p{Extended_Pictographic}])(?=\\s|$))|
(?:\\b[^\\r\\n]{1,${MAX_LIST_ITEM_LENGTH}}\\b(?=[\\r\\n]|$))|
(?:\\b[^\\r\\n]{1,${MAX_LIST_ITEM_LENGTH}}\\b(?=[.!?…]|\\.{3}|[\\u2026\\u2047-\\u2049]|[\\p{Emoji_Presentation}\\p{Extended_Pictographic}])
(?:.{1,${LOOKAHEAD_RANGE}}(?:[.!?…]|\\.{3}|[\\u2026\\u2047-\\u2049]|[\\p{Emoji_Presentation}\\p{Extended_Pictographic}])(?=\\s|$))?))` +
`(?:(?:\\r?\\n[ \\t]{2,5}(?:[-*+•]|\\d{1,3}\\.\\w\\.|\\[[ xX]\\])[ \\t]+
(?:(?:\\b[^\\r\\n]{1,${MAX_LIST_ITEM_LENGTH}}\\b
(?:[.!?…]|\\.{3}|[\\u2026\\u2047-\\u2049]|[\\p{Emoji_Presentation}\\p{Extended_Pictographic}])(?=\\s|$))
|(?:\\b[^\\r\\n]{1,${MAX_LIST_ITEM_LENGTH}}\\b(?=[\\r\\n]|$))
|(?:\\b[^\\r\\n]{1,${MAX_LIST_ITEM_LENGTH}}\\b(?=[.!?…]|\\.{3}|[\\u2026\\u2047-\\u2049]|[\\p{Emoji_Presentation}\\p{Extended_Pictographic}])
(?:.{1,${LOOKAHEAD_RANGE}}(?:[.!?…]|\\.{3}|[\\u2026\\u2047-\\u2049]|[\\p{Emoji_Presentation}\\p{Extended_Pictographic}])(?=\\s|$))?)))` +
`{0,${MAX_NESTED_LIST_ITEMS}}(?:\\r?\\n[ \\t]{4,${MAX_LIST_INDENT_SPACES}}(?:[-*+•]|\\d{1,3}\\.\\w\\.|\\[[ xX]\\])[ \\t]+
(?:(?:\\b[^\\r\\n]{1,${MAX_LIST_ITEM_LENGTH}}\\b
(?:[.!?…]|\\.{3}|[\\u2026\\u2047-\\u2049]|[\\p{Emoji_Presentation}\\p{Extended_Pictographic}])(?=\\s|$))
|(?:\\b[^\\r\\n]{1,${MAX_LIST_ITEM_LENGTH}}\\b(?=[\\r\\n]|$))
|(?:\\b[^\\r\\n]{1,${MAX_LIST_ITEM_LENGTH}}\\b(?=[.!?…]|\\.{3}|[\\u2026\\u2047-\\u2049]|[\\p{Emoji_Presentation}\\p{Extended_Pictographic}])
(?:.{1,${LOOKAHEAD_RANGE}}(?:[.!?…]|\\.{3}|[\\u2026\\u2047-\\u2049]|[\\p{Emoji_Presentation}\\p{Extended_Pictographic}])(?=\\s|$))?)))` +
`{0,${MAX_NESTED_LIST_ITEMS}})?)` +
"""
list_item_full_regex = regex.compile(
# 2. List items (bulleted, numbered, lettered, or task lists, including nested, up to three levels, with length constraints)
rf"(?:(?:^|\r?\n)[ \t]{{0,3}}(?:[-*+•]|\d{{1,3}}\.\w\.|\[[ xX]\])[ \t]+"
rf"(?:(?:\b[^\r\n]{{1,{MAX_LIST_ITEM_LENGTH}}}\b(?:[.!?…]|\.\.\.|[\u2026\u2047-\u2049]|[\p{{Emoji_Presentation}}\p{{Extended_Pictographic}}])(?=\s|$))"
rf"|(?:\b[^\r\n]{{1,{MAX_LIST_ITEM_LENGTH}}}\b(?=[\r\n]|$))"
rf"|(?:\b[^\r\n]{{1,{MAX_LIST_ITEM_LENGTH}}}\b(?=[.!?…]|\.\.\.|[\u2026\u2047-\u2049]|[\p{{Emoji_Presentation}}\p{{Extended_Pictographic}}])"
rf"(?:.{{1,{LOOKAHEAD_RANGE}}}(?:[.!?…]|\.\.\.|[\u2026\u2047-\u2049]|[\p{{Emoji_Presentation}}\p{{Extended_Pictographic}}])(?=\s|$))?))"
rf"(?:(?:\r?\n[ \t]{{2,5}}(?:[-*+•]|\d{{1,3}}\.\w\.|\[[ xX]\])[ \t]+"
rf"(?:(?:\b[^\r\n]{{1,{MAX_LIST_ITEM_LENGTH}}}\b"
rf"(?:[.!?…]|\.\.\.|[\u2026\u2047-\u2049]|[\p{{Emoji_Presentation}}\p{{Extended_Pictographic}}])(?=\s|$))"
rf"|(?:\b[^\r\n]{{1,{MAX_LIST_ITEM_LENGTH}}}\b(?=[\r\n]|$))"
rf"|(?:\b[^\r\n]{{1,{MAX_LIST_ITEM_LENGTH}}}\b(?=[.!?…]|\.\.\.|[\u2026\u2047-\u2049]|[\p{{Emoji_Presentation}}\p{{Extended_Pictographic}}])"
rf"(?:.{{1,{LOOKAHEAD_RANGE}}}(?:[.!?…]|\.\.\.|[\u2026\u2047-\u2049]|[\p{{Emoji_Presentation}}\p{{Extended_Pictographic}}])(?=\s|$))?)))"
rf"{{0,{MAX_NESTED_LIST_ITEMS}}}"
rf"(?:\r?\n[ \t]{{4,{MAX_LIST_INDENT_SPACES}}}(?:[-*+•]|\d{{1,3}}\.\w\.|\[[ xX]\])[ \t]+"
rf"(?:(?:\b[^\r\n]{{1,{MAX_LIST_ITEM_LENGTH}}}\b"
rf"(?:[.!?…]|\.\.\.|[\u2026\u2047-\u2049]|[\p{{Emoji_Presentation}}\p{{Extended_Pictographic}}])(?=\s|$))"
rf"|(?:\b[^\r\n]{{1,{MAX_LIST_ITEM_LENGTH}}}\b(?=[\r\n]|$))"
rf"|(?:\b[^\r\n]{{1,{MAX_LIST_ITEM_LENGTH}}}\b(?=[.!?…]|\.\.\.|[\u2026\u2047-\u2049]|[\p{{Emoji_Presentation}}\p{{Extended_Pictographic}}])"
rf"(?:.{{1,{LOOKAHEAD_RANGE}}}(?:[.!?…]|\.\.\.|[\u2026\u2047-\u2049]|[\p{{Emoji_Presentation}}\p{{Extended_Pictographic}}])(?=\s|$))?)))"
rf"{{0,{MAX_NESTED_LIST_ITEMS}}})?)"
,
regex.MULTILINE | regex.UNICODE
)
"""
// 3. Block quotes (including nested quotes and citations, up to three levels, with length constraints)
`(?:(?:^>(?:>|\\s{2,}){0,2}(?:
(?:\\b[^\\r\\n]{0,${MAX_BLOCKQUOTE_LINE_LENGTH}}\\b(?:[.!?…]|\\.{3}|[\\u2026\\u2047-\\u2049]|[\\p{Emoji_Presentation}\\p{Extended_Pictographic}])(?=\\s|$))
|(?:\\b[^\\r\\n]{0,${MAX_BLOCKQUOTE_LINE_LENGTH}}\\b(?=[\\r\\n]|$))
|(?:\\b[^\\r\\n]{0,${MAX_BLOCKQUOTE_LINE_LENGTH}}\\b(?=[.!?…]|\\.{3}|[\\u2026\\u2047-\\u2049]|[\\p{Emoji_Presentation}\\p{Extended_Pictographic}])
(?:.{1,${LOOKAHEAD_RANGE}}(?:[.!?…]|\\.{3}|[\\u2026\\u2047-\\u2049]|[\\p{Emoji_Presentation}\\p{Extended_Pictographic}])
(?=\\s|$))?))\\r?\\n?){1,${MAX_BLOCKQUOTE_LINES}})` +
"""
block_quotes_regex = regex.compile(
# 3. Block quotes (including nested quotes and citations, up to three levels, with length constraints)
rf"(?:(?:^>(?:>|\s{{2,}}){{0,2}}(?:"
rf"(?:\b[^\r\n]{{0,{MAX_BLOCKQUOTE_LINE_LENGTH}}}\b(?:[.!?…]|\.{3}|[\u2026\u2047-\u2049]|[\p{{Emoji_Presentation}}\p{{Extended_Pictographic}}])(?=\s|$))"
rf"|(?:\b[^\r\n]{{0,{MAX_BLOCKQUOTE_LINE_LENGTH}}}\b(?=[\r\n]|$))"
rf"|(?:\b[^\r\n]{{0,{MAX_BLOCKQUOTE_LINE_LENGTH}}}\b(?=[.!?…]|\.{3}|[\u2026\u2047-\u2049]|[\p{{Emoji_Presentation}}\p{{Extended_Pictographic}}])"
rf"(?:.{{1,{LOOKAHEAD_RANGE}}}(?:[.!?…]|\.{3}|[\u2026\u2047-\u2049]|[\p{{Emoji_Presentation}}\p{{Extended_Pictographic}}])"
rf"(?=\s|$))?))\r?\n?){{1,{MAX_BLOCKQUOTE_LINES}}})"
,
regex.MULTILINE | regex.UNICODE
)
# """
# // 4. Code blocks (fenced, indented, or HTML pre/code tags, with length constraints)
# `(?:(?:^|\\r?\\n)(?:\`\`\`|~~~)(?:\\w{0,${MAX_CODE_LANGUAGE_LENGTH}})?\\r?\\n[\\s\\S]{0,${MAX_CODE_BLOCK_LENGTH}}?(?:\`\`\`|~~~)\\r?\\n?` +
# `|(?:(?:^|\\r?\\n)(?: {4}|\\t)[^\\r\\n]{0,${MAX_LIST_ITEM_LENGTH}}(?:\\r?\\n(?: {4}|\\t)[^\\r\\n]{0,${MAX_LIST_ITEM_LENGTH}}){0,${MAX_INDENTED_CODE_LINES}}\\r?\\n?)` +
# `|(?:<pre>(?:<code>)?[\\s\\S]{0,${MAX_CODE_BLOCK_LENGTH}}?(?:</code>)?</pre>))` +
# """
code_blocks_regex = regex.compile(
# 4. Code blocks (fenced, indented, or HTML pre/code tags, with length constraints)
rf"(?:(?:^|\r?\n)(?:\`\`\`|~~~)(?:\w{{0,{MAX_CODE_LANGUAGE_LENGTH}}})?\r?\n[\s\S]{{0,{MAX_CODE_BLOCK_LENGTH}}}?(?:\`\`\`|~~~)\r?\n?"
rf"|(?:(?:^|\r?\n)(?: {4}|\t)[^\r\n]{{0,{MAX_LIST_ITEM_LENGTH}}}(?:\r?\n(?: {4}|\t)[^\r\n]{{0,{MAX_LIST_ITEM_LENGTH}}}){{0,{MAX_INDENTED_CODE_LINES}}}\r?\n?)"
rf"|(?:<pre>(?:<code>)?[\s\S]{{0,{MAX_CODE_BLOCK_LENGTH}}}?(?:</code>)?</pre>))"
,
regex.MULTILINE | regex.UNICODE
)
"""
// 5. Tables (Markdown, grid tables, and HTML tables, with length constraints)
`(?:(?:^|\\r?\\n)(?:\\|[^\\r\\n]{0,${MAX_TABLE_CELL_LENGTH}}\\|(?:\\r?\\n\\|[-:]{1,${MAX_TABLE_CELL_LENGTH}}\\|){0,1}
(?:\\r?\\n\\|[^\\r\\n]{0,${MAX_TABLE_CELL_LENGTH}}\\|){0,${MAX_TABLE_ROWS}}` +
`|<table>[\\s\\S]{0,${MAX_HTML_TABLE_LENGTH}}?</table>))` +
"""
tables_regex = regex.compile(
# 5. Tables (Markdown, grid tables, and HTML tables, with length constraints)
rf"(?:(?:^|\r?\n)(?:\|[^\r\n]{{0,{MAX_TABLE_CELL_LENGTH}}}\|(?:\r?\n\|[-:]{{1,{MAX_TABLE_CELL_LENGTH}}}\|)?"
rf"(?:\r?\n\|[^\r\n]{{0,{MAX_TABLE_CELL_LENGTH}}}\|){{0,{MAX_TABLE_ROWS}}}"
rf"|<table>[\s\S]{{0,{MAX_HTML_TABLE_LENGTH}}}?</table>))"
,
regex.MULTILINE | regex.UNICODE
)
"""
// 6. Horizontal rules (Markdown and HTML hr tag)
`(?:^(?:[-*_]){${MIN_HORIZONTAL_RULE_LENGTH},}\\s*$|<hr\\s*/?>)` +
"""
horizontal_rules_regex = regex.compile(
# 6. Horizontal rules (Markdown and HTML hr tag)
rf"(?:^(?:[-*_]){{{MIN_HORIZONTAL_RULE_LENGTH},}}\s*$|<hr\s*/?>)"
,
regex.MULTILINE | regex.UNICODE
)
"""
// 10. Standalone lines or phrases (including single-line blocks and HTML elements, with length constraints)
`(?:^(?:<[a-zA-Z][^>]{0,${MAX_HTML_TAG_ATTRIBUTES_LENGTH}}>)?(?:(?:[^\\r\\n]{1,${MAX_STANDALONE_LINE_LENGTH}}(?:[.!?…]|\\.\\.\\.|[\\u2026\\u2047-\\u2049]|[\\p{Emoji_Presentation}\\p{Extended_Pictographic}])(?=\\s|$))|(?:[^\\r\\n]{1,${MAX_STANDALONE_LINE_LENGTH}}(?=[\\r\\n]|$))|(?:[^\\r\\n]{1,${MAX_STANDALONE_LINE_LENGTH}}(?=[.!?…]|\\.\\.\\.|[\\u2026\\u2047-\\u2049]|[\\p{Emoji_Presentation}\\p{Extended_Pictographic}])(?:.{1,${LOOKAHEAD_RANGE}}(?:[.!?…]|\\.\\.\\.|[\\u2026\\u2047-\\u2049]|[\\p{Emoji_Presentation}\\p{Extended_Pictographic}])(?=\\s|$))?))(?:</[a-zA-Z]+>)?(?:\\r?\\n|$))` +
"""
standalone_lines_regex = regex.compile(
# 10. Standalone lines or phrases (including single-line blocks and HTML elements, with length constraints)
rf"(?:^(?:<[a-zA-Z][^>]{{0,{MAX_HTML_TAG_ATTRIBUTES_LENGTH}}}>)?(?:(?:[^\r\n]{{1,{MAX_STANDALONE_LINE_LENGTH}}}(?:[.!?…]|\.\.\.|[\u2026\u2047-\u2049]|[\p{{Emoji_Presentation}}\p{{Extended_Pictographic}}])(?=\s|$))|(?:[^\r\n]{{1,{MAX_STANDALONE_LINE_LENGTH}}}(?=[\r\n]|$))|(?:[^\r\n]{{1,{MAX_STANDALONE_LINE_LENGTH}}}(?=[.!?…]|\.\.\.|[\u2026\u2047-\u2049]|[\p{{Emoji_Presentation}}\p{{Extended_Pictographic}}])(?:.{{1,{LOOKAHEAD_RANGE}}}(?:[.!?…]|\.\.\.|[\u2026\u2047-\u2049]|[\p{{Emoji_Presentation}}\p{{Extended_Pictographic}}])(?=\s|$))?))(?:</[a-zA-Z]+>)?(?:\r?\n|$))"
,
regex.MULTILINE | regex.UNICODE
)
"""
// 7. Sentences or phrases ending with punctuation (including ellipsis and Unicode punctuation)
`(?:(?:[^\\r\\n]{1,${MAX_SENTENCE_LENGTH}}(?:[.!?…]|\\.\\.\\.|[\\u2026\\u2047-\\u2049]|[\\p{Emoji_Presentation}\\p{Extended_Pictographic}])(?=\\s|$))|(?:[^\\r\\n]{1,${MAX_SENTENCE_LENGTH}}(?=[\\r\\n]|$))|(?:[^\\r\\n]{1,${MAX_SENTENCE_LENGTH}}(?=[.!?…]|\\.\\.\\.|[\\u2026\\u2047-\\u2049]|[\\p{Emoji_Presentation}\\p{Extended_Pictographic}])(?:.{1,${LOOKAHEAD_RANGE}}(?:[.!?…]|\\.\\.\\.|[\\u2026\\u2047-\\u2049]|[\\p{Emoji_Presentation}\\p{Extended_Pictographic}])(?=\\s|$))?))` +
"""
sentences_regex = regex.compile(
# 7. Sentences or phrases ending with punctuation (including ellipsis and Unicode punctuation)
rf"(?:(?:[^\r\n]{{1,{MAX_SENTENCE_LENGTH}}}(?:[.!?…]|\.\.\.|[\u2026\u2047-\u2049]|[\p{{Emoji_Presentation}}\p{{Extended_Pictographic}}])(?=\s|$))|(?:[^\r\n]{{1,{MAX_SENTENCE_LENGTH}}}(?=[\r\n]|$))|(?:[^\r\n]{{1,{MAX_SENTENCE_LENGTH}}}(?=[.!?…]|\.\.\.|[\u2026\u2047-\u2049]|[\p{{Emoji_Presentation}}\p{{Extended_Pictographic}}])(?:.{{1,{LOOKAHEAD_RANGE}}}(?:[.!?…]|\.\.\.|[\u2026\u2047-\u2049]|[\p{{Emoji_Presentation}}\p{{Extended_Pictographic}}])(?=\s|$))?))"
,
regex.MULTILINE | regex.UNICODE
)
# // 8. Quoted text, parenthetical phrases, or bracketed content (with length constraints)
# "(?:" +
# `(?<!\\w)\"\"\"[^\"]{0,${MAX_QUOTED_TEXT_LENGTH}}\"\"\"(?!\\w)` +
# `|(?<!\\w)(?:['\"\`'"])[^\\r\\n]{0,${MAX_QUOTED_TEXT_LENGTH}}\\1(?!\\w)` +
# `|\\([^\\r\\n()]{0,${MAX_PARENTHETICAL_CONTENT_LENGTH}}(?:\\([^\\r\\n()]{0,${MAX_PARENTHETICAL_CONTENT_LENGTH}}\\)[^\\r\\n()]{0,${MAX_PARENTHETICAL_CONTENT_LENGTH}}){0,${MAX_NESTED_PARENTHESES}}\\)` +
# `|\\[[^\\r\\n\\[\\]]{0,${MAX_PARENTHETICAL_CONTENT_LENGTH}}(?:\\[[^\\r\\n\\[\\]]{0,${MAX_PARENTHETICAL_CONTENT_LENGTH}}\\][^\\r\\n\\[\\]]{0,${MAX_PARENTHETICAL_CONTENT_LENGTH}}){0,${MAX_NESTED_PARENTHESES}}\\]` +
# `|\\$[^\\r\\n$]{0,${MAX_MATH_INLINE_LENGTH}}\\$` +
# `|\`[^\`\\r\\n]{0,${MAX_MATH_INLINE_LENGTH}}\`` +
# ")" +
quoted_regex = regex.compile(
# 8. Quoted text, parenthetical phrases, or bracketed content (with length constraints)
rf"(?:"
rf"(?<!\w)\"\"\"[^\"]{{0,{MAX_QUOTED_TEXT_LENGTH}}}\"\"\"(?!\w)"
rf"|(?<!\w)(?:['\"\`\'])[^\r\n]{{0,{MAX_QUOTED_TEXT_LENGTH}}}\\1(?!\w)"
rf"|\([^\r\n()]{{0,{MAX_PARENTHETICAL_CONTENT_LENGTH}}}(?:\([^\r\n()]{{0,{MAX_PARENTHETICAL_CONTENT_LENGTH}}}\)[^\r\n()]{{0,{MAX_PARENTHETICAL_CONTENT_LENGTH}}}){{0,{MAX_NESTED_PARENTHESES}}}\)"
rf"|\[[^\r\n\[\]]{{0,{MAX_PARENTHETICAL_CONTENT_LENGTH}}}(?:\[[^\r\n\[\]]{{0,{MAX_PARENTHETICAL_CONTENT_LENGTH}}}\][^\r\n\[\]]{{0,{MAX_PARENTHETICAL_CONTENT_LENGTH}}}){{0,{MAX_NESTED_PARENTHESES}}}\]"
rf"|\$[^\r\n$]{{0,{MAX_MATH_INLINE_LENGTH}}}\$"
rf"|\"[^\"\r\n]{{0,{MAX_MATH_INLINE_LENGTH}}}\""
rf")"
,
regex.MULTILINE | regex.UNICODE
)
"""
// 9. Paragraphs (with length constraints)
`(?:(?:^|\\r?\\n\\r?\\n)(?:<p>)?(?:(?:[^\\r\\n]{1,${MAX_PARAGRAPH_LENGTH}}(?:[.!?…]|\\.{3}|[\\u2026\\u2047-\\u2049]|[\\p{Emoji_Presentation}\\p{Extended_Pictographic}])(?=\\s|$))|(?:[^\\r\\n]{1,${MAX_PARAGRAPH_LENGTH}}(?=[\\r\\n]|$))|(?:[^\\r\\n]{1,${MAX_PARAGRAPH_LENGTH}}(?=[.!?…]|\\.{3}|[\\u2026\\u2047-\\u2049]|[\\p{Emoji_Presentation}\\p{Extended_Pictographic}])(?:.{1,${LOOKAHEAD_RANGE}}(?:[.!?…]|\\.{3}|[\\u2026\\u2047-\\u2049]|[\\p{Emoji_Presentation}\\p{Extended_Pictographic}])(?=\\s|$))?))(?:</p>)?(?=\\r?\\n\\r?\\n|$))` +
"""
paragraphs_regex = regex.compile(
# 9. Paragraphs (with length constraints)
rf"(?:(?:^|\r?\n\r?\n)(?:<p>)?(?:(?:[^\r\n]{{1,{MAX_PARAGRAPH_LENGTH}}}(?:[.!?…]|\.{3}|[\u2026\u2047-\u2049]|[\p{{Emoji_Presentation}}\p{{Extended_Pictographic}}])(?=\s|$))|(?:[^\r\n]{{1,{MAX_PARAGRAPH_LENGTH}}}(?=[\r\n]|$))|(?:[^\r\n]{{1,{MAX_PARAGRAPH_LENGTH}}}(?=[.!?…]|\.{3}|[\u2026\u2047-\u2049]|[\p{{Emoji_Presentation}}\p{{Extended_Pictographic}}])(?:.{{1,{LOOKAHEAD_RANGE}}}(?:[.!?…]|\.{3}|[\u2026\u2047-\u2049]|[\p{{Emoji_Presentation}}\p{{Extended_Pictographic}}])(?=\s|$))?))(?:</p>)?(?=\r?\n\r?\n|$))"
,
regex.MULTILINE | regex.UNICODE
)
"""
// 11. HTML-like tags and their content (including self-closing tags and attributes, with length constraints)
`(?:<[a-zA-Z][^>]{0,${MAX_HTML_TAG_ATTRIBUTES_LENGTH}}(?:>[\\s\\S]{0,${MAX_HTML_TAG_CONTENT_LENGTH}}?</[a-zA-Z]+>|\\s*/>))` +
"""
HTML_like_tags_regex = regex.compile(
# 11. HTML-like tags and their content (including self-closing tags and attributes, with length constraints)
rf"(?:<[a-zA-Z][^>]{{0,{MAX_HTML_TAG_ATTRIBUTES_LENGTH}}}(?:>[\s\S]{{0,{MAX_HTML_TAG_CONTENT_LENGTH}}}?</[a-zA-Z]+>|\s*/>))"
,
regex.MULTILINE | regex.UNICODE
)
"""
// 12. LaTeX-style math expressions (inline and block, with length constraints)
`(?:(?:\\$\\$[\\s\\S]{0,${MAX_MATH_BLOCK_LENGTH}}?\\$\\$)|(?:\\$[^\\$\\r\\n]{0,${MAX_MATH_INLINE_LENGTH}}\\$))` +
"""
LaTeX_style_math_regex = regex.compile(
# 12. LaTeX-style math expressions (inline and block, with length constraints)
rf"(?:(?:\$\$[\s\S]{{0,{MAX_MATH_BLOCK_LENGTH}}}?\$\$)|(?:\$[^\$\r\n]{{0,{MAX_MATH_INLINE_LENGTH}}}\$))"
,
regex.MULTILINE | regex.UNICODE
)
"""
// 14. Fallback for any remaining content (with length constraints)
`(?:(?:[^\\r\\n]{1,${MAX_STANDALONE_LINE_LENGTH}}(?:[.!?…]|\\.{3}|[\\u2026\\u2047-\\u2049]|[\\p{Emoji_Presentation}\\p{Extended_Pictographic}])(?=\\s|$))|(?:[^\\r\\n]{1,${MAX_STANDALONE_LINE_LENGTH}}(?=[\\r\\n]|$))|(?:[^\\r\\n]{1,${MAX_STANDALONE_LINE_LENGTH}}(?=[.!?…]|\\.{3}|[\\u2026\\u2047-\\u2049]|[\\p{Emoji_Presentation}\\p{Extended_Pictographic}])(?:.{1,${LOOKAHEAD_RANGE}}(?:[.!?…]|\\.{3}|[\\u2026\\u2047-\\u2049]|[\\p{Emoji_Presentation}\\p{Extended_Pictographic}])(?=\\s|$))?))` +
"""
fallback_regex = regex.compile(
# 14. Fallback for any remaining content (with length constraints)
rf"(?:(?:[^\r\n]{{1,{MAX_STANDALONE_LINE_LENGTH}}}(?:[.!?…]|\.{3}|[\u2026\u2047-\u2049]|[\p{{Emoji_Presentation}}\p{{Extended_Pictographic}}])(?=\s|$))|(?:[^\r\n]{{1,{MAX_STANDALONE_LINE_LENGTH}}}(?=[\r\n]|$))|(?:[^\r\n]{{1,{MAX_STANDALONE_LINE_LENGTH}}}(?=[.!?…]|\.{3}|[\u2026\u2047-\u2049]|[\p{{Emoji_Presentation}}\p{{Extended_Pictographic}}])(?:.{{1,{LOOKAHEAD_RANGE}}}(?:[.!?…]|\.{3}|[\u2026\u2047-\u2049]|[\p{{Emoji_Presentation}}\p{{Extended_Pictographic}}])(?=\s|$))?))"
,
regex.MULTILINE | regex.UNICODE
)
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