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  1. #!/usr/bin/perl
  2. push @{$h{lc $_}}, $_ for <STDIN>;
  3. print "@{$_}" for grep{@$_ > 1} values %h;
Success #stdin #stdout 0s 17496KB
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https://ideone.com/Mbj5Hz
language:
Perl (perl 5.28.1)
created:
5 years ago
visibility:
public

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