qixiaobin0715

@echo off
setlocal enabledelayedexpansion
set /p str=<1.txt
(for /f "delims=" %%a in ('type 1.txt^|sort') do (
    if not "!str!"=="%%a" (
        echo,!str!
    )
    set str=%%a
)
echo,!str!)>2.txt
pause
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