#!/usr/bin/perl -w
use strict;$|++;$_=<DATA>;y,a-zA-Z,a-hA-N i-qO-Zr-z,,my @i=split//;print chr(10).chr(13);my @o=("A");my $c=65;select(undef,undef,undef,0.01),$o[$#o+1]=chr(++$c),print chr(8).$o[$#o-1].chr(8)for(0..$#i);print chr(10).chr(13);for my$c(0..$#i){my($e,$d)=(0,$c);select(undef,undef,undef,$e),$e=($#o/($#o-$c+1))*0.010,$o[$d]=($c/++$d%2)?chr(ord($o[$d+1])):$o[$d],print chr(8).$o[$d].chr(8)for($c..$#i);print$i[$c].chr(10);}__DATA__
!rVTUwiCDUheSwHeSAwpaczeS!