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  1. $_ = 'text unsubtext did not text subscribe text';
  2. print "OK" if /(?!.*did\s+not)(?!.*unsub).*subscribe/;
Success #stdin #stdout 0s 4596KB
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Standard input is empty
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OK
https://ideone.com/j4SUp
language:
Perl (perl 5.28.1)
created:
11 years ago
visibility:
public

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