#234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234 @u='0335443554366887798866555766'=~/./g;$_=pop;print"$_ is ",$_=$_-4?$_<20?$u[$_]||4:$u[chop]+$u[$_+18]:magic,".\n"until/\D/