def readints():
    return list(map(int, input().strip().split()))


def transpose(m):
    return list(zip(*m))


def reverseRows(m):
    return  [list(reversed(r)) for r in m]


def rotate90(m):
    return reverseRows(transpose(m))

magic = [
    [8, 1, 6],
    [3, 5, 7],
    [4, 9, 2]
]

no_reflections = [
    magic,
    rotate90(magic),
    rotate90(rotate90(magic)),
    rotate90(rotate90(rotate90(magic)))
    ]

all_magic = no_reflections + [reverseRows(m) for m in no_reflections]

def read_matrix():
    return [readints() for _ in range(3)]


def matrix_diff(m1, m2):
    err = 0
    for row1, row2 in zip(m1, m2):
        for a, b in zip(row1, row2):
            err += abs(a - b)
    return err


def main():
    matrix = read_matrix()
    print(min(matrix_diff(magic, matrix) for magic in all_magic))
main()