import java.io.*;
import java.util.*;
import java.text.*;
import java.math.*;
import java.util.regex.*;

public class Solution {

    public static void main(String[] args) {
        /* Enter your code here. Read input from STDIN. Print output to STDOUT. Your class should be named Solution. */
        Scanner in = new Scanner(System.in);
        int [] arrInt = new int[9];
        int [][] arrSMat = {{4,9,2,3,5,7,8,1,6},{8,1,6,3,5,7,4,9,2},{2,9,4,7,5,3,6,1,8},{8,3,4,1,5,9,6,7,2},
        		{6,7,2,1,5,9,8,3,4},{4,3,8,9,5,1,2,7,6},{6,1,8,7,5,3,2,9,4},{2,7,6,9,5,1,4,3,8}};
        for(int i = 0; i < 9; i++)
    		arrInt[i] = in.nextInt();
        
        int [] arrCost =new int[8];
        int maxCost = 1000;
        for(int i = 0; i < 8; i++)
        {
        	for(int j = 0; j < 9; j++){
        		arrCost[i] += Math.abs(arrSMat[i][j]-arrInt[j]);
        	}
        	if(arrCost[i] < maxCost){
        		maxCost = arrCost[i];
        	}
        }
        
        System.out.println(maxCost);
    }
}