#include<stdio.h>
int main()
{
    int quaX,priX;
    int quaY,priY;
    int quaZ,priZ;
    scanf("%d %d",&quaX,&priX);
    scanf("%d %d",&quaY,&priY);
    scanf("%d %d",&quaZ,&priZ);
   int tc=((quaXxpriX)+(quaYxpriY)+(quaZxpriZ));
   printf("%d",tc);
}