set substr=%APPEND_LIST:\\=\%
  set tmp_substr=!substr!
  for /L %%a in (1,1,%IN_PARTS%) do (
    set /a tmp_ctr=%%a
    for /f "tokens=1* delims=," %%i in ("!tmp_substr!") do (
      if NOT [%%j]=="" (
        set tmp_delstr=%%j
      )
      @echo    %%a^) %%i
    )
    set tmp_substr=!tmp_delstr!
  )