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())))

maximum = -9 * 7

for i in range(6):

for j in range(6):

if j + 2 < 6 and i + 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 > maximum:

maximum = result

print(maximum)