77七

@echo off
set "f1=D:\TXT"
set "f2=E:\123"
for %%a in ("%f1%\*.txt") do (
	set /a n+=1
	call set _%%random%%_%%n%%=%%a
)
for /d %%d in ("%f2%\*") do (
	call :1 "%%d"
)
pause & exit

	:1
	for /f "tokens=1* delims==" %%a in ('2^>nul set _') do (
		copy "%%b" "%~1"
		set %%a=
		exit /b
	)
	exit /b
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