@echo off
setlocal enabledelayedexpansion
(for /f "tokens=1* delims=-" %%i in (a.txt) do (
    set n=%%~ni
    REM set n=!str:/*=!
    if !n! lss 100000 (
        echo %%i-%%j
    )
))>b.txt
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findstr /v "\/[0-9][0-9][0-9][0-9][0-9][0-9]" a.txt > b.txt
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@echo off&setlocal enabledelayedexpansion
(for /f "delims=" %%a in (a.txt) do (
    for /f "delims=-" %%i in ("%%~na") do (
        set "str=%%i"
        if "!str:~5!" == "" echo %%a
    )
))>b.txt
pause
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