S = []
for _ in range(3):
    r = list(map(int, input().split()))
    S.append(r)
    
A = [[4,9,2], [3,5,7], [8,1,6]]
B = [[2,9,4], [7,5,3], [6,1,8]]
C = [[8,3,4], [1,5,9], [6,7,2]]
D = [[4,3,8], [9,5,1], [2,7,6]]
E = [[6,7,2], [1,5,9], [8,3,4]]
F = [[2,7,6], [9,5,1], [4,3,8]]
G = [[6,1,8], [7,5,3], [2,9,4]]
H = [[8,1,6], [3,5,7], [4,9,2]]

L = [A, B, C, D, E, F, G, H]
cost = 72
for ms in L:
    diff = 0
    for i in range(3):
        for j in range(3):
            diff += abs(S[i][j] - ms[i][j])
    if diff < cost:
        cost = diff

print(cost)