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Regular expression regexp

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[a-zA-Z0-9]|\p{Punct}|\n\r

[a-zA-Z0-9]|\p{Punct}|\n\r
punctuation\p{Punct}+
number[0-9]+
start with number^[0-9]+
remove all letters[a-z]|[A-Z]
all letters ( including Chinese char )

[[:alpha:]]

[\u\l]


Find:    \p{Punct}+

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