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  1. or download this
    $ha = [[1,2],
           [5,5,5],
    ...
           [1,2],
           [2,1],
           [5,5,5]];
    
  2. or download this
    use Set::Bag;
    my $bag_a = Set::Bag->new();
    my $bag_b = Set::Bag->new();
    
  3. or download this
    my @ser_a;
    for my $aref (@$ha) {
    ...
       print "not ";
    }
    print "equal\n";