@bar=sort {zc($a) <=> zc($b)} permute([0..2],[0..2],[0..2],[0..2],[0..2]); sub zc{ my $arg=shift; my @a=split //,$arg; return (grep /0/,@a[0..1])+(grep /0/,@a[3..4]); } #### push @list,permute(nz($a),nz($b),$c,nz($d),nz($e)); push @list,permute([0],nz($b),$c,nz($d),nz($e)); push @list,permute(nz($a),[0],$c,nz($d),nz($e)); push @list,permute(nz($a),nz($b),$c,[0],nz($e)); push @list,permute(nz($a),nz($b),$c,nz($d),[0]); push @list,permute([0],[0],$c,nz($d),nz($e)); etc...