yhcfsr

@echo off&setlocal enabledelayedexpansion

for /f "delims=" %%a in (1.txt) do (
    for /f "delims=" %%b in ('dir /a-d/s/b "1\*%%~a*"') do (
		if not defined %%a (
			set "%%a=%%a"
			set "_%%a="
			set "name=%%~nxb"
		) else (
			set/a "_%%a+=1"
			set "name=%%~nb(!_%%a!)%%~xb"
		)
		copy "%%b" "2\!name!"	
	)
)
pause
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