keen

来个效率低下的：

@echo off&setlocal enabledelayedexpansion
for /l %%a in (1 1 10000) do (
    for /f "delims=" %%b in (a.txt) do (
        for %%c in (%%b) do (
            if %%a equ %%c set /p= %%a<nul&set /a n+=1&if !n! equ 6 echo\&set n=0
)))
pause
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