#include <iostream>
#include <algorithm>
#include <vector>
#include <cstdlib>

using namespace std;

int main(int argc, char const *argv[]) {
	
	ios::sync_with_stdio(0);

	int square[3][3];
	int sCompare[8][3][3];

	sCompare[0][0][0] = 6;
	sCompare[0][0][1] = 1;
	sCompare[0][0][2] = 8;
	sCompare[0][1][0] = 7;
	sCompare[0][1][1] = 5;
	sCompare[0][1][2] = 3;
	sCompare[0][2][0] = 2;
	sCompare[0][2][1] = 9;
	sCompare[0][2][2] = 4;

	sCompare[1][0][0] = 8;
	sCompare[1][0][1] = 3;
	sCompare[1][0][2] = 4;
	sCompare[1][1][0] = 1;
	sCompare[1][1][1] = 5;
	sCompare[1][1][2] = 9;
	sCompare[1][2][0] = 6;
	sCompare[1][2][1] = 7;
	sCompare[1][2][2] = 2;

	sCompare[2][0][0] = 4;
	sCompare[2][0][1] = 9;
	sCompare[2][0][2] = 2;
	sCompare[2][1][0] = 3;
	sCompare[2][1][1] = 5;
	sCompare[2][1][2] = 7;
	sCompare[2][2][0] = 8;
	sCompare[2][2][1] = 1;
	sCompare[2][2][2] = 6;

	sCompare[3][0][0] = 2;
	sCompare[3][0][1] = 7;
	sCompare[3][0][2] = 6;
	sCompare[3][1][0] = 9;
	sCompare[3][1][1] = 5;
	sCompare[3][1][2] = 1;
	sCompare[3][2][0] = 4;
	sCompare[3][2][1] = 3;
	sCompare[3][2][2] = 8;

	sCompare[4][0][0] = 2;
	sCompare[4][0][1] = 9;
	sCompare[4][0][2] = 4;
	sCompare[4][1][0] = 7;
	sCompare[4][1][1] = 5;
	sCompare[4][1][2] = 3;
	sCompare[4][2][0] = 6;
	sCompare[4][2][1] = 1;
	sCompare[4][2][2] = 8;
	
	sCompare[5][0][0] = 4;
	sCompare[5][0][1] = 3;
	sCompare[5][0][2] = 8;
	sCompare[5][1][0] = 9;
	sCompare[5][1][1] = 5;
	sCompare[5][1][2] = 1;
	sCompare[5][2][0] = 2;
	sCompare[5][2][1] = 7;
	sCompare[5][2][2] = 6;

	sCompare[6][0][0] = 8;
	sCompare[6][0][1] = 1;
	sCompare[6][0][2] = 6;
	sCompare[6][1][0] = 3;
	sCompare[6][1][1] = 5;
	sCompare[6][1][2] = 7;
	sCompare[6][2][0] = 4;
	sCompare[6][2][1] = 9;
	sCompare[6][2][2] = 2;
	
	sCompare[7][0][0] = 6;
	sCompare[7][0][1] = 7;
	sCompare[7][0][2] = 2;
	sCompare[7][1][0] = 1;
	sCompare[7][1][1] = 5;
	sCompare[7][1][2] = 9;
	sCompare[7][2][0] = 8;
	sCompare[7][2][1] = 3;
	sCompare[7][2][2] = 4;

	for (int i = 0; i < 3; ++i)
		for (int j = 0; j < 3; ++j)
			cin >> square[i][j];


	int total = 100;
	int cur = 0;
	for (int i = 0; i < 8; ++i) {
		cur += abs(sCompare[i][0][0] - square[0][0]);
		cur += abs(sCompare[i][0][1] - square[0][1]);
		cur += abs(sCompare[i][0][2] - square[0][2]);
		cur += abs(sCompare[i][1][0] - square[1][0]);
		cur += abs(sCompare[i][1][1] - square[1][1]);
		cur += abs(sCompare[i][1][2] - square[1][2]);
		cur += abs(sCompare[i][2][0] - square[2][0]);
		cur += abs(sCompare[i][2][1] - square[2][1]);
		cur += abs(sCompare[i][2][2] - square[2][2]);

		if (total > cur)
			total = cur;
		cur = 0;
	}

	cout << total << '\n';

	return 0;
}