@echo off
chcp 1252>nul
SETLOCAL DisableDelayedExpansion
set Nbres=0
FOR /F "usebackq delims=" %%a in (`"findstr /n ^^ fnID_fr.txt"`) do (
    set "var=%%a"
    SETLOCAL EnableDelayedExpansion
    set "var=!var:*:=!"

    if %Nbres% leq 10
    goto :set10
    if %Nbres% leq 100
    goto :set100
    goto :set0

:set100
    set DIGITS=0
    goto :set0
:set10
    set DIGITS=00
:set0

    if not exist "!Nbres! !var!" mkdir "!Nbres! !var!"

    set Nbres=%Nbres%+1

)
chcp %cp%>nul
pause