def find_diff(s1,s2):
    sum = 0
    for i in range(3):
        for j in range(3):
            sum += abs(s1[i][j]-s2[i][j])
    return sum
ans_sq = [[[8,3,4],
           [1,5,9],
           [6,7,2]],
          [[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]],
          [[6,7,2],
           [1,5,9],
           [8,3,4]],
          [[2,9,4],
           [7,5,3],
           [6,1,8]],
          [[4,3,8],
           [9,5,1],
           [2,7,6]],
          [[8,1,6],
           [3,5,7],
           [4,9,2]]]
s = []
for i in range(3):
    s.append([int(x) for x in input().split()])
diffs = [find_diff(s,x) for x in ans_sq]
print(min(diffs))