#!/usr/bin/perl

use strict;

## writen by overload
## email overload@pcquestios.net


&main;

sub main{
while(){
my $what='';

print"(R)ot13 (B)ackwards (T)wist (Q)uit\n";
print"What will it be: ";
chomp($what = <STDIN>);

 if($what ne "R" && $what ne "B" && $what ne "T" && $what ne "Q"){
  print"Not a choice\n";
   redo;
} 

if($what eq "B"){
 &back;
}

if($what eq "R"){
 &rot;
}

if($what eq "T"){
&twist;
}

if($what eq "Q"){
 print"Good bye\n";
 exit;
}

sub back{
print"Type letmeout to quit\n";
  while(){
   my $line='';
   my $newline='';
    print"Reverse a line: ";
    chomp($line = <STDIN>);
     if($line eq "letmeout"){
       print"Bye\n";
       &main;
     }
  
   my $newline = reverse("$line");
   print"$newline\n";
 }
}


sub rot{
print"Type letmeout to quit\n";
   while(){
    my $line='';
    print"Rot13: ";
    chomp($line = <STDIN>);
    
      if($line eq "letmeout"){
       print"Bye\n";
       &main;
      }

    $line =~ tr /a-zA-Z/n-za-mN-ZA-M/;
    print"$line\n";
  }
}


sub twist{
 print"Twist uses Rot13 the reverse's it\n";
 print"Type letmeout to quit\n";
  while(){
     my $line='';
     my $newline='';
     print"Twist: ";
     chomp($line = <STDIN>);
 
        if($line eq "letmeout"){
         print"Bye\n";
         &main;
        }
	
     $line =~ tr /a-zA-Z/n-za-mN-ZA-M/;

     my $newline = reverse("$line");

     print ("$newline\n");
    }
   }
   
 }
}