#!/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())))
    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)