use strict; use warnings; use feature qw{ say }; my @x = ( 3, 2, 4, 0, 3, 0, 4, 0, 3, 2, 0, 4 ); my @y = ( 0, 0, 0, 1, 1, 0, 3, 3, 3, 3, 2, 2 ); my @rects = map { [ split m{:}, substr $_, 8 ] } sort map { my $packed = ~ ( pack q{N}, $x[ $_ ] ) . pack q{Na*}, $y[ $_ ], join( q{:}, $x[ $_ ], $y[ $_ ] ) } 0 .. $#x; my $n = 0; say qq{@{[ sprintf q{%2d}, $n ++ ] }: @$_} for @rects;