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@echo off&setlocal enabledelayedexpansion
for /f "tokens=1-3 delims=- " %%i in (a.txt) do (
    for /f "tokens=1,2 delims= " %%a in (b.txt) do (
        set var=%%a0000
        set var=!var:~0,7!
        if !var! geq %%i if !var! leq %%j if %%b neq %%k echo %%a %%b>>c.txt
    )
)
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