import sys
mat = []
for _ in range(3):
    mat += [int(x) for x in input().split()]

squares = [[2, 7, 6, 9, 5, 1, 4, 3, 8],
[2, 9, 4, 7, 5, 3, 6, 1, 8],
[4, 3, 8, 9, 5, 1, 2, 7, 6],
[4, 9, 2, 3, 5, 7, 8, 1, 6],
[6, 1, 8, 7, 5, 3, 2, 9, 4],
[6, 7, 2, 1, 5, 9, 8, 3, 4],
[8, 1, 6, 3, 5, 7, 4, 9, 2],
[8, 3, 4, 1, 5, 9, 6, 7, 2]]
cost = min([sum(abs(x - y) for x, y in zip(mat, sq)) for sq in squares])
print(cost)