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@echo off&setlocal enabledelayedexpansion
set "folder=C:\test"
for /f %%i in ("%folder%") do set "name=%%~nxi"
for /d /r "%folder%" %%i in (*) do (
     set "f=1"
     for /d %%i in ("%%i\*") do if defined f set "f="
     if defined f (
        set "newfilename=%%i"
        set "newfilename=!newfilename:%folder%=%name%!"
        ren "%%i" "!newfilename:\=-!"
     )
)
pause
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