foreach my $newq (keys %hash1)
    {
         foreach my $oldq(keys %hash2)
         {
         if ( $newq eq $oldq)
         {
         foreach my $newx1(@{$hash1{$newq}{x1}})
         {
         foreach my $oldx1(@{$hash2{$oldq}{x1}})
         {
         if ($newx1 == $oldx1)
         {
         print "$newq\t$newx1\t$oldx1\n";
         }
         if ($newx1 != $oldx1)
         {
         print "$newq\t$newx1\t$oldx1\n";
         }
             }