
CODE: [Copy to clipboard]@echo off&setlocal enabledelayedexpansion
(for /f "delims=: tokens=1*" %%a in ('findstr /n .* a.txt') do (
if "%%b" gtr "Z" (
set var=%%b
if "!var:~,1!" neq "本" (echo (%%b) else echo %%b
) else echo.%%b
))>(.txt
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