# Enter your code here. Read input from STDIN. Print output to STDOUT
arr = []
arr.extend([int(x) for x in raw_input().strip().split()])
arr.extend([int(x) for x in raw_input().strip().split()])
arr.extend([int(x) for x in raw_input().strip().split()])

magic_squares = [[4, 9, 2, 3, 5, 7, 8, 1, 6], [8, 3, 4, 1, 5, 9, 6, 7, 2], [6, 1, 8, 7, 5, 3, 2, 9, 4], [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], [8, 1, 6, 3, 5, 7, 4, 9, 2], [6, 7, 2, 1, 5, 9, 8, 3, 4]]

costs = []
for square in magic_squares:
    cost = 0
    for i in range(len(arr)):
        cost += abs(square[i] - arr[i])
    costs.append(cost)

print min(costs)