# Enter your code here. Read input from STDIN. Print output to STDOUT

def cost(s1,s2):
    cost_value=0
    for i in xrange(3):
        for j in xrange(3):
            cost_value = cost_value + abs(s1[i][j]-s2[i][j])
    return cost_value

square=[]
for i in xrange(3):
    inputas=map(int,raw_input().strip().split())
    square.append(inputas)
magics={1:[[8, 1 ,6],[3, 5, 7],[4, 9, 2]],2:[[4, 3, 8],[9, 5, 1],[2, 7, 6]],3:[[2, 9, 4],[7, 5, 3],[6, 1, 8]],
       4:[[6, 7, 2],[1, 5, 9],[8, 3, 4]],5:[[6, 1, 8],[7, 5, 3],[2, 9, 4]],6:[[2, 7, 6],[9, 5, 1],[4, 3 ,8]],
       7:[[4, 9, 2],[3, 5, 7],[8, 1, 6]],8:[[8, 3, 4],[1, 5, 9],[6, 7, 2]]}

costs=[]
for each in xrange(1,9):
    costs.append(cost(square,magics[each]))
print min(costs)