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Character Class Meta-Character Matches
\p{Lower} Lowercase letter [a-z]
\p{Upper} Uppercase letter [A-Z]
\p{ASCII} All ASCII [\x00-\x7F]
\p{Alpha} Any lowercase or uppercase letter
\p{Digit} A digit [0-9]
\p{Alnum} Any letter or digit
\p{Punct} Punctuation [!"#$%&'()*+,-./:;<=>?@[\]^_`{|}~]
\p{Graph} A visible character: any letter, digit, or punctuation
\p{Print} A printable character; same as \p{Graph}
\p{Blank} A space or tab [ \t]
\p{Cntrl} A control character [\x00-\x1F\x7F]
\p{XDigit} Hexadecimal digit [0-9a-fA-F]
\p{Space} A whitespace character [ \t\n\x0B\f\r]
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