
CODE: [Copy to clipboard]@echo off&setlocal enabledelayedexpansion
(for /f "delims=" %%a in (a.txt) do (
if defined neq if !neq! neq 1 echo !echo!
set/a neq+=1
set echo=%%a
))>temp.han
del /q a.txt
ren temp.han a.txt
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