#include <cmath>
#include <cstdio>
#include <vector>
#include <iostream>
#include <algorithm>
using namespace std;


int main() {
	/* Enter your code here. Read input from STDIN. Print output to STDOUT */
	int cc;
	int sol;
	int b[9];

	int msquares[8][9] = { { 8,1,6,3,5,7,4,9,2 },{ 6,1,8,7,5,3,2,9,4 },{ 4,9,2,3,5,7,8,1,6 },{ 2,9,4,7,5,3,6,1,8 },{ 8,3,4,1,5,9,6,7,2 },{ 4,3,8,9,5,1,2,7,6 },{ 6,7,2,1,5,9,8,3,4 },{ 2,7,6,9,5,1,4,3,8 } };

	for(int i = 0; i < 9; i++)
	{
		cin >> b[i];
	}
	for (int i = 0; i < 8; i++) {
		cc = 0;
		for (int j = 0; j < 9; j++) {
			cc = cc + int(abs(msquares[i][j] - b[j]));
		}
		if (cc < sol) {

			sol = cc;//finding least cost
		}
	}

	cout << sol;


	return 0;
}