Bah, you call that golfing? :) You used multi-letter variable names and more than one space. 

/(H\(\d+\))/&&push@{$c{$1}},"$_\n"for@r;
print map@{$c{$_}},grep$#{$c{$_}},keys%c;

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In reply to Re: Re: Re: Re: duplicate lines in array by Fletch
in thread duplicate lines in array by harry34

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