cjiabing

@echo off&setlocal enabledelayedexpansion
for /f "tokens=*" %%a in ("abcdefghijklmnopqrstuvwxyz") do (
set var=%%a
for /l %%i in (0,1,100000) do if not "!var:~%%i,1!"=="" set /p=!var:~%%i,1! <nul
)
pause>nul
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