import java.io.*;

import java.util.*;

public class HourGlassJava{

public static void main(String[] args){

int[][] arr = new int[6][6];

int temp = 0;

int max = Integer.MIN_VALUE;

Scanner sc = new Scanner(System.in);

for(int i = 0 ; i < 6 ; i++){

for(int j = 0 ; j < 6 ; j++){

arr[i][j] = sc.nextInt();

}

}

for(int i = 0 ; i < 4 ; i++){

for(int j = 0 ; j < 4 ; j++){

temp = arr[i][j] + arr[i][j+1] + arr[i][j+2]

+arr[i+1][j+1]

+arr[i+2][j] + arr[i+2][j+1] + arr[i+2][j+2];

if (max < temp){

max = temp;

}

}

}

System.out.println(max);

}

}