def getCostElement(a, b):
        cost = a - b
        if cost < 0: cost = -cost
        return cost
        
magicSquares = []
magicSquares.append([8,1,6,3,5,7,4,9,2])
magicSquares.append([6,7,2,1,5,9,8,3,4])
magicSquares.append([4,3,8,9,5,1,2,7,6])
magicSquares.append([2,9,4,7,5,3,6,1,8])
magicSquares.append([8,3,4,1,5,9,6,7,2])
magicSquares.append([6,1,8,7,5,3,2,9,4])
magicSquares.append([4,9,2,3,5,7,8,1,6])
magicSquares.append([2,7,6,9,5,1,4,3,8])
matrix = list(map(int, input().split() + input().split() + input().split()))


answers = []
for n in range(8):

    tempCost = 0
    for i, j in zip(matrix, magicSquares[n]):
        tempCost += getCostElement(i,j)

    answers.append(tempCost)
        
print(min(answers))