Parse the box number out of a PO or PO Box or Postal Box or Box

https://docs.racket-lang.org/guide/Looking_Ahead_and_Behind.html

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these are my common regexp

these are my common regexp

French association register number RNA

Business register number for France SIRET

SIREN for french business register number

Match on a phone number in ANY standard phone number format.

Match on VALID IP address anywhere in string.