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[][] matrix = new int[3][3];
        for(int row=0;row<3;row++) {
            for(int col=0;col<3;col++) {
                matrix[row][col] = in.nextInt();
            }
        }
        
        int[] result = new int[8];
        
        /*Initialize four matrix */
        int[][] m0 = {{8,1,6},{3,5,7},{4,9,2}};
        int[][] m1 = {{8,3,4},{1,5,9},{6,7,2}}; 
        int[][] m2 = {{4,3,8},{9,5,1},{2,7,6}}; 
        int[][] m3 = {{4,9,2},{3,5,7},{8,1,6}};
        
        for(int row=0;row<3;row++) {
            for(int col=0;col<3;col++) {
                if(matrix[row][col] != m0[row][col]) {
                    result[0] = result[0] + Math.abs(matrix[row][col] - m0[row][col]);
                }
                if(matrix[row][col] != Math.abs(10 - m0[row][col])) {
                    result[1] = result[1] + Math.abs(matrix[row][col] - Math.abs(10 - m0[row][col]));
                }
                                                     
                if(matrix[row][col] != m1[row][col]) {
                    result[2] = result[2] + Math.abs(matrix[row][col] - m1[row][col]);
                }
                if(matrix[row][col] != Math.abs(10 - m1[row][col])) {
                    result[3] = result[3] + Math.abs(matrix[row][col] - Math.abs(10 - m1[row][col]));
                }
                                                     
                if(matrix[row][col] != m2[row][col]) {
                    result[4] = result[4] + Math.abs(matrix[row][col] - m2[row][col]);
                }
                if(matrix[row][col] != Math.abs(10 - m2[row][col])) {
                    result[5] = result[5] + Math.abs(matrix[row][col] - Math.abs(10 - m2[row][col]));
                }
                                                     
                if(matrix[row][col] != m3[row][col]) {
                    result[6] = result[6] + Math.abs(matrix[row][col] - m3[row][col]);
                }
                if(matrix[row][col] != Math.abs(10 - m3[row][col])) {
                    result[7] = result[7] + Math.abs(matrix[row][col] - Math.abs(10 - m3[row][col]));
                }
            }
        }
        int min = 1000;
        for(int i=0;i<8;i++) {
            if(result[i] < min) {
                min = result[i];
            }
        }
        System.out.println(min);
                                                     
        
    }
}