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  1. perl -nale '@F=reverse @F if($F[0]>$F[1]); $x=$F[0]." ".$F[1]; if(!$h{$x}){print $x;$h{$x}=1;}'
Success #stdin #stdout 0.02s 5348KB
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https://ideone.com/v3NuA
language:
Bash (bash 5.0.3)
created:
11 years ago
visibility:
public

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