ms1 = [[8,1,6],[3,5,7],[4,9,2]]
ms2 = [[8,3,4],[1,5,9],[6,7,2]]
ms3 = [[6,7,2],[1,5,9],[8,3,4]]
ms4 = [[4,9,2],[3,5,7],[8,1,6]]
ms5 = [[2,9,4],[7,5,3],[6,1,8]]
ms6 = [[2,7,6],[9,5,1],[4,3,8]]
ms7 = [[4,3,8],[9,5,1],[2,7,6]]
ms8 = [[6,1,8],[7,5,3],[2,9,4]]

#print(ms1[0]-ms2[0])


m1 = list(map(int, input().split()))
m2 = list(map(int, input().split()))
m3 = list(map(int, input().split()))

notMagic = [m1, m2, m3]
costs = []


cost = 0
for row in range(3):
    for col in range(3):
        cost += abs(notMagic[row][col] - ms1[row][col])
costs.append(cost)

cost = 0
for row in range(3):
    for col in range(3):
        cost += abs(notMagic[row][col] - ms2[row][col])
costs.append(cost)

cost = 0
for row in range(3):
    for col in range(3):
        cost += abs(notMagic[row][col] - ms3[row][col])
costs.append(cost)

cost = 0
for row in range(3):
    for col in range(3):
        cost += abs(notMagic[row][col] - ms4[row][col])
costs.append(cost)

cost = 0
for row in range(3):
    for col in range(3):
        cost += abs(notMagic[row][col] - ms5[row][col])
costs.append(cost)

cost = 0
for row in range(3):
    for col in range(3):
        cost += abs(notMagic[row][col] - ms6[row][col])
costs.append(cost)

cost = 0
for row in range(3):
    for col in range(3):
        cost += abs(notMagic[row][col] - ms7[row][col])
costs.append(cost)

cost = 0
for row in range(3):
    for col in range(3):
        cost += abs(notMagic[row][col] - ms8[row][col])
costs.append(cost)
        

print(min(costs))