@echo off
setlocal enabledelayedexpansion
set "n='
for /f "delims=" %%i in ('dir /s/b/ad') do (
    pushd "%%~fsi"&call :a "%%~ni"
    for %%a in (*) do if defined %%~xa set "%%~xa="
)
pause&exit

:a
for /f "delims=" %%i in ('dir /b/aa') do (
    if not defined %%~xi call :b "%%~xi" "%~1"&set "%%~xi=i"
)
goto :eof

:b
for /f "delims=" %%a in ('dir /b/aa *%~1') do (
    ren "%%~fsa" "%~2!n!%%~xa" 2>nul
    set/a n+=1
)
set "n="
goto :eof
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