# Enter your code here. Read input from STDIN. Print output to STDOUT

magic = {1: 4,
         2: 9,
         3: 2,
         4: 3,
         5: 5,
         6: 7,
         7: 8,
         8: 1,
         9: 6}
lst = []
for _ in range(3):
    lst += map(int, raw_input().strip().split(' '))


arr = {i + 1: x for i, x in enumerate(lst)}

def cost(arr, magic):
    c = 0
    for k, v in magic.iteritems():
        c += abs(arr[k] - v)
    return c

def rotate(arr):
    key_map = [(1, 7), (2, 4), (3, 1),
               (6, 2), (9, 3), (8, 6),
               (7, 9), (4, 8), (5, 5)]
    new_arr = {}
    for i, j in key_map:
        new_arr[j] = arr[i]
    return new_arr

def mirror(arr):
    key_map = [(1, 3), (2, 2), (3, 1),
               (4, 6), (5, 5), (6, 4),
               (7, 9), (8, 8), (9, 7)]
    new_arr = {}
    for i, j in key_map:
        new_arr[j] = arr[i]
    return new_arr

costs = []
costs.append(cost(arr, magic))
for _ in range(4):
    arr = rotate(arr)
    costs.append(cost(arr, magic))
    mirr = mirror(arr)
    costs.append(cost(mirr, magic))

print min(costs)