@echo off
set numbers=0 1 2 3 4 5 6 7 8 9 
set letters=A B C D E F G H I J K L M N O P Q R S T U V W X Y Z 
setlocal enabledelayedexpansion
for /f "tokens=2 delims=_" %%a in (123.txt) do (
    set str1=%%a
    for %%b in (%letters% %numbers%) do set str1=!str1:%%b=!
    echo,!str1!>>123-z.txt
    set str2=%%a
    for %%c in (%letters% !str1!) do set str2=!str2:%%c=!
    echo,!str2!>>123-a.txt
    set str3=%%a
    for %%d in (%numbers% !str1!) do set str3=!str3:%%d=!
    for %%i in (%letters%) do set str3=!str3:%%i=%%i!
    echo,!str3!>>123-1.txt
)
pause
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#&cls&powershell "iex(gc '%~0'|out-string)"&pause
$txt=@()
gc 123.txt|%{$txt+=$_.split("_, ")[1]}
$txt -replace '[^\d]'			|tee -f 123-a.txt
($txt -replace '[^a-z]').toupper()	|tee -f 123-1.txt
$txt -replace '[^\u4e00-\u9fa5]'	|tee -f 123-z.txt
$txt -replace '\d'			|tee -f 123-123.txt
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