if __name__ == '__main__':
    arr = []
    for _ in range(6):
        arr.append(list(map(int, input().rstrip().split())))

hourglass = [
    sum(
        [
            sum(arr[i][j: j + 3]),
            arr[i + 1][j+1],
            sum(arr[i + 2][j: j + 3])
        ]
    )
        for i in range(6) for j in range(6) if (j + 3 <= 6) and (i + 1 < 6) and (i + 2 < 6)
            ]

print(max(hourglass))