#!/usr/bin/perl $_="@ARGV";@_=(0..9,1..9);chop,print"$_\n"while s/.(?=(.))/$_[$&+$+]/g
#!/usr/bin/perl $_="@ARGV";@_=(0..9,1..9);print"$_\n";chop,print"$_\n"while s/.(?=(.))/$_[$&+$+]/g