#!/bin/python3

import math
import os
import random
import re
import sys

# Complete the hourglassSum function below.
def hourglassSum(arr):
    if arr is None:
        return 0
    newrow = len(arr)-2
    newcol = len(arr[0])-2
    if newrow <= 0 or newcol <= 0:
        return 0
    hourglass = [[0 for col in range(newcol)] for row in range(newrow)]
    for row in range(len(hourglass)):
        for col in range(len(hourglass[0])):
            hourglass[row][col] = arr[row][col] + arr[row][col+1] + arr[row][col+2]
            hourglass[row][col] += arr[row+1][col+1]
            hourglass[row][col] += arr[row+2][col] + arr[row+2][col+1] + arr[row+2][col+2]
    maxValue = max(hourglass[0])
    for row in range(1,len(hourglass)):
        if maxValue < max(hourglass[row]):
            maxValue = max(hourglass[row])
    return maxValue


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()