a=[]
x=gets.strip.split(" ").map(&:to_i)
a.push(x)
x=gets.strip.split(" ").map(&:to_i)
a.push(x)
x=gets.strip.split(" ").map(&:to_i)
a.push(x)
cost=0
b=[[[4,9,2],[3,5,7],[8,1,6]],[[8,3,4],[1,5,9],[6,7,2]],[[6,1,8],[7,5,3],[2,9,4]],[[2,7,6],[9,5,1],[4,3,8]],[[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]],[[6,7,2],[1,5,9],[8,3,4]]]
ans=[]
for i in 0...8
	c=0
	for j in 0...3
		for k in 0...3
			c=c+(a[j][k]-b[i][j][k]).abs
		end
	end
	ans.push(c)
end
print ans.min