r1 = [int(r_temp) for r_temp in input().strip().split(' ')]
r2 = [int(r_temp) for r_temp in input().strip().split(' ')]
r3 = [int(r_temp) for r_temp in input().strip().split(' ')]

square = [r1,r2,r3]

sums = dict()
sums["r1"] = sum(square[0])
sums["r2"] = sum(square[1])
sums["r3"] = sum(square[2])
sums["c1"] = square[0][0] + square[1][0] + square[2][0]
sums["c2"] = square[0][1] + square[1][1] + square[2][1]
sums["c3"] = square[0][2] + square[1][2] + square[2][2]
sums["main_diag"] = square[0][0] + square[1][1] + square[2][2]
sums["sec_diag"] = square[0][2] + square[1][1] + square[2][0]

magic1 = [[4, 9, 2], [3, 5, 7], [8, 1, 6]]
magic2 = [[2, 9, 4], [7, 5, 3], [6, 1, 8]]
magic3 = [[2, 7, 6], [9, 5, 1], [4, 3, 8]]
magic4 = [[6, 7, 2], [1, 5, 9], [8, 3, 4]]
magic5 = [[6, 1, 8], [7, 5, 3], [2, 9, 4]]
magic6 = [[8, 1, 6], [3, 5, 7], [4, 9, 2]]
magic7 = [[8, 3, 4], [1, 5, 9], [6, 7, 2]]
magic8 = [[4, 3, 8], [9, 5, 1], [2, 7, 6]]

magic_squares = [magic1, magic2, magic3, magic4, magic5, magic6, magic7, magic8]

cost_vector = dict()
square_num = 1

for magic_square in magic_squares:
    cost = 0
    
    for row in range(0,3):
        for column in range(0,3):
            diff = abs(square[row][column] - magic_square[row][column])
            cost += diff
    cost_vector[str(square_num)] = cost
    square_num += 1

difference = list()

for value in cost_vector.values():
    difference.append(value)

min_cost = min(difference)
print(min_cost)