set /P s=
set /a a=%s:~0,2%
set /a b=%s:~3,2%
set /a c=%s:~6,2%
set /a d=%s:~9,2%
set /a e=%s:~12,2%
set /a f=%s:~15,2%
set /a g=%s:~18,2%
set /a h=%s:~21,2%
set /a i=%s:~24,2%
set /a j=%s:~27,2%
set /a k=%s:~30,2%
set /a l=%s:~33,2%
set /a g-=a
set /a h-=b
set /a i-=c
set /a j-=a
set /a k-=b
set /a l-=c
set /a z=((e-b)*(i*j-g*l)+(f-c)*(g*k-h*j)+(d-a)*(h*l-i*k))/6
echo %l%