QIAOXINGXING

@echo off&SetLocal EnableDelayEdexpansion&cd /d "%~dp0"

set "str=FFFFFFFFFFFFFFFFFF0000000000"
for /l %%a in (0 2 100) do (
  if not "!str:~%%a,2!" == "" (
    set /p nstr=!str:~%%a,2!,<nul
  ) else (
    echo;&pause&exit
  )
)
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