#!/bin/python3

import math
import os
import random
import re
import sys

#
# Complete the 'hourglassSum' function below.
#
# The function is expected to return an INTEGER.
# The function accepts 2D_INTEGER_ARRAY arr as parameter.
#

def hourglassSum(arr):
    arrsum = []
    def hourglass(arr,i,j):
        hg = []
        for n in range(3): 
            if j + n >= len(arr[0]):
                return []
            else:
                hg.append(arr[i][j+n])
                print(arr[i][j+n])
                
        if i + 1 >= len(arr):
            return []
        else:
            hg.append(arr[i+1][j+1])
            print(arr[i+1][j+1])
        
        if i + 2 < len(arr):
            for n in range(3): 
                hg.append(arr[i+2][j+n])
        else:
            return []
        return hg
        
    for i in range (len(arr)):
        for j in range (len(arr[0])):                    
            hg =  hourglass(arr,i,j)
            if hg != []:
                arrsum.append(sum(hg))
                
                
    return max(arrsum)
                
    
            


if __name__ == '__main__':
    fptr = open(os.environ['OUTPUT_PATH'], 'w')

    arr = []

    for _ in range(6):
        arr.append(list(map(int, input().rstrip().split())))

    result = hourglassSum(arr)

    fptr.write(str(result) + '\n')

    fptr.close()