@echo off
for /f "delims=" %%i in (a.txt) do set v=0&set m=0&set n=-1&set a=%%i&call :lp %%a%%
start b.txt
goto :eof
:lp
set /a n+=1
call,set var=%%a:~%n%,1%%
if "%var%"=="" set m=1
for %%i in (0,1,2,3,4,5,6,7,8,9,) do if "%var%"=="%%i" set /a v+=1
if %v% gtr 0 set /a var+=1
if "%var%"=="10" set var=0
set str=%str%%var%
if %m% neq 1 set v=0&goto lp
echo %str%>>b.txt
set str=&goto :eof