This sounds like ONE of the earliest "secret codes" ever used, the substitution code. The Roman emperor Julius Caesar who died in the year 44 BC used such a code, which is named after him. The problem you are going to have is that you seem to want to make letters of the alphabet into numbers, and there are 26 letters in the alphabet but only 10 digits (0 to 9), so you cannot have a simple one-to-one translation. You COULD encode each letter of the alphabet into a two digit number, but you are going to run into all kinds of problems if you have some one and some two-digit numbers, as some people have already pointed out. Also batch scripting is about the worst language I can think of for doing this. A "scrambled alphabet" type of code is quite simple to implement in batch, but the code is not BEGINNER's level.

http://en.wikipedia.org/wiki/Substitution_cipher

Code: [Select]@echo off
setlocal ENABLEDELAYEDEXPANSION
set /p c=enter number sequence:
set c1=%c:~0,1%
if not %c1%==, set c=,%c%
set d=%c:,26=z%
set d=%d:,25=y%
set d=%d:,24=x%
set d=%d:,23=w%
set d=%d:,22=v%
set d=%d:,21=u%
set d=%d:,20=t%
set d=%d:,19=s%
set d=%d:,18=r%
set d=%d:,17=q%
set d=%d:,16=p%
set d=%d:,15=o%
set d=%d:,14=n%
set d=%d:,13=m%
set d=%d:,12=l%
set d=%d:,11=k%
set d=%d:,10=j%
set d=%d:,9=i%
set d=%d:,8=h%
set d=%d:,7=g%
set d=%d:,6=f%
set d=%d:,5=e%
set d=%d:,4=d%
set d=%d:,3=c%
set d=%d:,2=b%
set d=%d:,1=a%
echo %d%
pause
Quote

setlocal ENABLEDELAYEDEXPANSION

You could encode each letter of the alphabet into a two digit number