square =[]
for i in range(3):
    square.extend([int(square_temp) for square_temp in input().strip().split(' ')])
cnt  = 0
a = []
a.append([4,9,2,3,5,7,8,1,6]) 
a.append([2,9,4,7,5,3,6,1,8])
a.append([8,1,6,3,5,7,4,9,2])
a.append([6,1,8,7,5,3,2,9,4])

a.append([4,3,8,9,5,1,2,7,6])
a.append([8,3,4,1,5,9,6,7,2])
a.append([2,7,6,9,5,1,4,3,8])
a.append([6,7,2,1,5,9,8,3,4])
b = [0] * 8
for i in range(9):
    for j in range(8):
        b[j] += abs(square[i] - a[j][i])
print(min(b))