# Enter your code here. Read input from STDIN. Print output to STDOUT
n=[]
n.append(map(int, raw_input().strip().split(' ')))
n.append(map(int, raw_input().strip().split(' ')))
n.append(map(int, raw_input().strip().split(' ')))
p=[[[4,9,2],[3,5,7],[8,1,6]],[[2,7,6],[9,5,1],[4,3,8]],[[6,1,8],[7,5,3],[2,9,4]],[[8,3,4],[1,5,9],[6,7,2]],[[2,9,4],[7,5,3],[6,1,8]],[[6,7,2],[1,5,9],[8,3,4]],[[8,1,6],[3,5,7],[4,9,2]],[[4,3,8],[9,5,1],[2,7,6]]]
min=100
for i in range(8):
    cost=0
    for j in range(3):
        for k in range(3):
            cost=cost+abs(p[i][j][k]-n[j][k])
    if cost<min:
        min=cost
print min