77七

@echo off
cd /d "%~dp0"
for /f "useback delims=" %%a in ("1.txt") do (
	if not defined a (
		set a=%%a
	) else (
		set b=%%a
		setlocal enabledelayedexpansion
		echo !a! !b!
		endlocal
		set a=%%a
	)
)
pause
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