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  1. or download this
    perl -wMstrict -MData::Compare -E 'my @a=qw(1 2 a b); my @b=qw(1 2 a b
    +); say Compare(\@a, \@b);'
    1
    
    perl -wMstrict -MData::Compare -E 'my @a=qw(1 3 a b); my @b=qw(1 2 a b
    +); say Compare(\@a, \@b);'
    0