@sorted = map { $_-[0] } sort { $a->[2] cmp $b->[2] || ($a->[1] || 0) <=> ($b->[1] || 0) || $a->[2] <=> $b->[2] || $a->[3] <=> $b->[3] } map { [ $_, /(?:(\d+)\s+)?(\w)\s+(\d+):(\d+)/ ] } @unsorted;