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


int main() {
    
    int min = 999;
	int cost = 0;
	int input[9];
	
	int solutions[8][9] = {
		{ 8, 1, 6, 3, 5, 7, 4, 9, 2 },
		{ 8, 3, 4, 1, 5, 9, 6, 7, 2 },
		{ 6, 7, 2, 1, 5, 9, 8, 3, 4 },
		{ 4, 9, 2, 3, 5, 7, 8, 1, 6 },
		{ 2, 9, 4, 7, 5, 3, 6, 1, 8 },
		{ 2, 7, 6, 9, 5, 1, 4, 3, 8 },
		{ 4, 3, 8, 9, 5, 1, 2, 7, 6 },
		{ 6, 1, 8, 7, 5, 3, 2, 9, 4 }
	};

	for (int i = 0; i < 9; i++) {
		cin >> input[i];
	}

	for (int i = 0; i < 8; i++) { 
		for (int j = 0; j < 9; j++) {
			cost += abs(input[j] - solutions[i][j]);
		}
		min = cost < min ? cost : min;
		cost = 0;
	}

	cout << min;
    return 0;
}