rat

@echo off & setlocal
set /p PwdInput=Plz input:
1>nul 2<&1 set PwdInput || (echo No & goto:eof)
set PwdDefined=123
set %PwdInput%=1
set %PwdDefined%=
1>nul 2<&1 set %PwdInput% && echo No || echo Yes
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