set /p q=
for /f "tokens=1-12 delims=%q:~8,1% " %%a in ("%q%") do (
set /a a=%%d-%%a
set /a b=%%e-%%b
set /a c=%%f-%%c
set /a d=%%g-%%a
set /a e=%%h%%b
set /a f=%%i%%c
set /a g=%%j-%%a
set /a h=%%k-%%b
set /a i=%%l-%%c
)
set /a v=(%a%*%e%*%i%+%b%*%f%*%g%+%c%*%d%*%h%-%a%*%h%*%f%-%b%*%i%*%d%-%c%*%g%*%e%)/6
echo %v%