sq=[]

sq.append(map(int,raw_input().split()))
sq.append(map(int,raw_input().split()))
sq.append(map(int,raw_input().split()))

a = []
a.append([[8,1,6],[3,5,7],[4,9,2]])
a.append([[4,9,2],[3,5,7],[8,1,6]])
a.append([[8,3,4],[1,5,9],[6,7,2]])
a.append([[4,3,8],[9,5,1],[2,7,6]])
a.append([[2,9,4],[7,5,3],[6,1,8]])
a.append([[2,7,6],[9,5,1],[4,3,8]])
a.append([[6,7,2],[1,5,9],[8,3,4]])
a.append([[6,1,8],[7,5,3],[2,9,4]])
m = 8*9
for i in xrange(8):
	ans = 0
	for j in xrange(3):
		for k in xrange(3):
			ans+=abs(a[i][j][k] - sq[j][k])
	if ans < m:
		m = ans
print m