square = [map(int, raw_input().split())]

for i in range(0, 2):
    square.append(map(int, raw_input().split()))

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

min_cost = float("inf")
for ms in all_ms:
    ms_cost = 0

    for i in range(0, 3):
        for j in range(0, 3):
            ms_cost += abs(square[i][j] - ms[i][j])

    if ms_cost < min_cost:
        min_cost = ms_cost

print(min_cost)