<?for($c=~\xdf;$b=fgetc(STDIN);$c=$b)echo($b<~\xf4&&$b=~\xdf)?~\xe4\xa4\xcb\xc6\x92\xf5:($b!=$c?~\xe4\xa4\xcb.(md5(xlhX.$b)%10).~\x92\xdf\xdf:~\xdf\xdf)?>\x1b[49m
Note that non-ascii characters in the above source code will be escaped (such as \x9f).