# Enter your code here. Read input from STDIN. Print output to STDOUT
mt = [[],[],[]]
mt[0] = map(int,raw_input().split())
mt[1] = map(int,raw_input().split())
mt[2] = map(int,raw_input().split())

mgs = [[[],[],[]] for i in range(0,8)]

mgs[0] = [[8,1,6],
        [3,5,7],
        [4,9,2]] 
mgs[1] = [[4,9,2],
        [3,5,7],
        [8,1,6]]
mgs[2] = [[6,1,8],
        [7,5,3],
        [2,9,4]]
mgs[3] = [[2,9,4],
        [7,5,3],
        [6,1,8]]
mgs[4] = [[8,3,4],
        [1,5,9],
        [6,7,2]] 
mgs[5] = [[6,7,2],
        [1,5,9],
        [8,3,4]] 
mgs[6] = [[4,3,8],
        [9,5,1],
        [2,7,6]] 
mgs[7] = [[2,7,6],
        [9,5,1],
        [4,3,8]] 

#compare given matrix with all the 8 magic squares and see which one can have the least difference
difference = []
for t in range(0,8):
    current  = 0
    for i in range(0,3):
        for j in range(0,3):
            current = current + abs(mt[i][j]-mgs[t][i][j])
    difference.append(current)
print(min(difference))