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my $matches = grep {/1=$TAB_1/ && /5=$TAB_5/} @contents ;
my $matches = grep {/1=\Q$TAB_1\E/ && /5=\Q$TAB_5\E/} @contents ;
my $matches = grep {/1=\Q$TAB_1\E.*5=\Q$TAB_5\E/} @contents ;