Help for this page
# note that I used {} as the delimiter for tr/// $foo =~ tr{1234567890!@#$%^&*()-+=\\|~} {?/><:;[]{}poidjhgk5329%c1^};
$"=$,,$_=q>|\p4<6 8p<M/_|<('=> .q>.<4-KI<l|2$<6%s!<qn#F<>;$, .=pack'N*',"@{[unpack'C*',$_] }"for split/</;$_=$,,y[A-Z a-z] {}cd;print lc