@echo off&setlocal enabledelayedexpansion&cls&color 0f&title Welcome to CN-DOS!
mode con: cols=30 lines=3
set "a= PC-X69"
set b=
set "c=12345689abcde"
echo\
:c
for /l %%a in (6,1,28) do (
set /a d=%random%%%13+1
call :pp %%a
)
goto c
:pp
set/p=!a:~-%1!
