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#! /usr/bin/perl ... lll Lets mad.gif
@:1107530717::1 is a duplicate of @:1107530709::1 @:1107532976::1 is a duplicate of @:1107532758::1
undef $/; my $file = <DATA>; $file =~ s/^\@:\d{10,}:(?:\d{10,})?:1\n(.*?) (^\@:\d{10,}:(?:\d{10,})?:1\n\1)/$2/msxg; print $file;