mat = []
for i in range(0,3):
    mat.extend([int(x) for x in input().split()])

# magic square base form
mag = [2,9,4,7,5,3,6,1,8]

min_cost = 1000

def rot(x):
    return [x[y] for y in [6,3,0,7,4,1,8,5,2]]

def mirr(x):
    return [x[y] for y in [2,1,0,5,4,3,8,7,6]]

def diff(x,y):
    return sum([abs(a-b) for a,b in zip(x,y)])

for r in range(1,5):
    mag = rot(mag)
    min_cost = min(min_cost, diff(mag, mat))
    min_cost = min(min_cost, diff(mirr(mag), mat))
    
print(min_cost)