fElement = input().split()
fElement = [int(i) for i in fElement]
sElement = input().split()
sElement = [int(i) for i in sElement]
tElement = input().split()
tElement = [int(i) for i in tElement]
matrix = fElement + sElement + tElement
allSolutions = [[8, 1, 6, 3, 5, 7, 4, 9, 2],[6, 1, 8, 7, 5, 3, 2, 9, 4],
                [4, 3, 8, 9, 5, 1, 2, 7, 6], [2,7,6,9,5,1,4,3,8],
               [2,9,4,7,5,3,6,1,8],[4,9,2,3,5,7,8,1,6],
               [6,7,2,1,5,9,8,3,4],[8,3,4,1,5,9,6,7,2]]

i = 0
cost = 45
while(i < 8):
    j = 0
    currentCost = 0
    while(j < 9):
        currentCost = currentCost + abs(allSolutions[i][j] - matrix[j])
        j+= 1
    if(currentCost < cost):
        cost = currentCost
    i+=1
print(cost)