#!/bin/python3

import math
import os
import random
import re
import sys



if __name__ == '__main__':
    arr = []

    for _ in range(6):
        arr.append(list(map(int, input().rstrip().split())))
    
    count = -9*7
    for i in range(6):
        for j in range(6):
            if i+2<6 and j+2<6:
                result = 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 result>count:
                count = result

    print(count)                
