jains521

@echo off& setlocal enabledelayedexpansion

set __var1=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 
set __var2=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
set /p var=input strings:
call :setvar __var1
call :setvar __var2

set n=0
:chg
if not "!var:~%n%,1!" equ "" (
	if "!var:~%n%,1!" equ " " (set _vartmp=!_vartmp! ) else (
		set #tmp=!var:~%n%,1!
		for /f "tokens=2 delims==" %%i in ('set _!#tmp!') do (
			if not "!var:~%n%,1!" equ "%%i" set __vartmp=!__vartmp!%%i
		)
	)
	set /a n+=1
	goto chg
)
echo !__vartmp!
pause
goto :eof

:setvar
for %%i in (!%1!) do set _%%i%1=%%i
goto :eof
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