matrix = [[0]*3]*3
for i in range(3):
    matrix[i] = [int(j) for j in input().strip().split(' ')]

squares = [[[8, 1, 6], [3, 5, 7], [4, 9, 2]],[[4, 3, 8], [9, 5, 1], [2, 7, 6]] ,[[2, 9, 4], [7, 5, 3], [6, 1, 8]] ,[[6, 7, 2], [1, 5, 9], [8, 3, 4]] ,[[6,1,8], [7, 5, 3], [2, 9, 4]] , [[4, 9, 2], [3, 5, 7], [8, 1, 6]] ,[[8, 3, 4], [1, 5, 9], [6, 7, 2]], [[2, 7, 6], [9, 5, 1], [4, 3, 8]] ]
    
min_cost = 15*9
for sq in squares:
    cost = 0
    for i in range(3):
        for j in range(3):
            cost += abs(sq[i][j] - matrix[i][j])
    if cost<min_cost:
        min_cost = cost

print(min_cost)