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

int main() {
    
	int ms[3][3];
	//vector<int*> msq(8);
	
	int msq[8][3][3];
	
	msq[0][0][0] = 4;
	msq[0][0][1] = 9;
	msq[0][0][2] = 2;
	msq[0][1][0] = 3;
	msq[0][1][1] = 5;
	msq[0][1][2] = 7;
	msq[0][2][0] = 8;
	msq[0][2][1] = 1;
	msq[0][2][2] = 6;

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

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

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

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

	msq[7][0][0] = 2;
	msq[7][0][1] = 7;
	msq[7][0][2] = 6;
	msq[7][1][0] = 9;
	msq[7][1][1] = 5;
	msq[7][1][2] = 1;
	msq[7][2][0] = 4;
	msq[7][2][1] = 3;
	msq[7][2][2] = 8;
	
	int cost = 100;

	cin >> ms[0][0] >> ms[0][1] >> ms[0][2];
	cin >> ms[1][0] >> ms[1][1] >> ms[1][2];
	cin >> ms[2][0] >> ms[2][1] >> ms[2][2];	   
	
	for(int i = 0; i < 8; i++){
		int totalCost = 0;
		for(int c = 0; c < 3; c ++){

			for(int t = 0; t < 3; t ++){
			
				totalCost += fabs(msq[i][c][t] - ms[c][t]);			
			
			}		
		
		}

		if(cost > totalCost){
			cost = totalCost;
		}	
	
	}		
	
	cout << cost;
		
	return 0;
}