foreach $key( map { $_->[1] }
              sort { $a->[0] <=> $b->[0] }
              map { m/q(\d+)/; [ $1, $_ ] }
              keys %hash ){
  print "$key : $hash{$key}\n";
}


##</code><code>##

$,=42;for(34,0,-3,9,-11,11,-17,7,-5){$*.=pack'c'=>$,+=$_}for(reverse split//=>$*
){$%++?$ %%2?push@C,$_,$":push@c,$_,$":(push@C,$_,$")&&push@c,$"}$C[$#C]=$/;($#C
>$#c)?($ c=\@C)&&($ C=\@c):($ c=\@c)&&($C=\@C);$%=$|;for(@$c){print$_^$$C[$%++]}