[文本处理] 求助 批处理 任意两个字母组合五位

set aa=c
set bb=d

set a=abbba
set b=ababb
set c=abaaa
call set abc=%%a:a=%aa%%%
call set abc=%%abc:b=%bb%%%
echo %abc%
call set abc=%%b:a=%aa%%%
call set abc=%%abc:b=%bb%%%
echo %abc%
call set abc=%%c:a=%aa%%%
call set abc=%%abc:b=%bb%%%
echo %abc%
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@echo off
:loop 
for %%a in (a1 a2) do call :rnd %%a
if a1==a2 goto loop
echo;随机两个字母为：%a1%  %a2%

setlocal enabledelayedexpansion
for /l %%a in (1 1 5) do (
set /a n=!random!%%2
if !n! equ 0 (set ok=!ok!!a1!) else (set ok=!ok!!a2!)
)
echo;%ok%&pause>nul
exit

:rnd
set str=abcdefghijklmnopqrstuvwxyz
setlocal enabledelayedexpansion
set /a rnd=%random%%%26
call set  str=%%str:~%rnd%,1%%
endlocal&set %1=%str%
goto :eof
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@powershell "type '%~0'|select -skip 1|out-string|iex"&pause&exit
$a=[char](97..122)[(random 25)]
$b=[char](97..122)[(random 25)]
(1..5|%{get-random -input $a,$b}) -join ''
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