#include <stdio.h>

int main(void)
{
    int a[5][5];
    int b = 0,
    sum = 0;
    for(int i = 0;i < 5;i++) scanf("%d %d %d %d %d",&a[i][0],&a[i][1],&a[i][2],&a[i][3],&a[i][4]);
    for(int i = 4;i > 2;i--)
    {
        for(int z = 4-b; z > b;z--)
        {
            if(z == i){sum += a[i][z]; continue;}
            sum += a[i][z] + a[z][i];
        }
        b = 5 - i;
    }
    printf("%d",sum);
}