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 s = new Scanner(System.in);
        int i,j;
        int arr[][] = new int[3][3];
        for(i=0;i<3;i++) {
        	for(j=0;j<3;j++) {
        		arr[i][j] = s.nextInt();
        	}
        }
        int x1[][] = {
        		{4,9,2},
        		{3,5,7},
        		{8,1,6}
        };
        int x2[][] = {
        		{4,3,8},
        		{9,5,1},
        		{2,7,6}
        };
        int x3[][] = {
        		{2,7,6},
        		{9,5,1},
        		{4,3,8}
        };
        int x4[][] = {
        		{2,9,4},
        		{7,5,3},
        		{6,1,8}
        };
        int x5[][] = {
        		{8,1,6},
        		{3,5,7},
        		{4,9,2}
        };
        int x6[][] = {
        		{8,3,4},
        		{1,5,9},
        		{6,7,2}
        };
        int x7[][] = {
        		{6,1,8},
        		{7,5,3},
        		{2,9,4}
        };
        int x8[][] = {
        		{6,7,2},
        		{1,5,9},
        		{8,3,4}
        };
          
       int sub1[][] = new int[3][3];
       int sub2[][] = new int[3][3];
       int sub3[][] = new int[3][3];
       int sub4[][] = new int[3][3];
       int sub5[][] = new int[3][3];
       int sub6[][] = new int[3][3];
       int sub7[][] = new int[3][3];
       int sub8[][] = new int[3][3];
       int sum1=0,sum2=0,sum3=0,sum4=0,sum5=0,sum6=0,sum7=0,sum8=0;
     
       for(i=0;i<3;i++) {
    	   for(j=0;j<3;j++) {
    		   sub1[i][j]=Math.abs(x1[i][j]-arr[i][j]);
    		   sum1+=sub1[i][j];
    		   sub2[i][j]=Math.abs(x2[i][j]-arr[i][j]);
    		   sum2+=sub2[i][j];
    		   sub3[i][j]=Math.abs(x3[i][j]-arr[i][j]);
    		   sum3+=sub3[i][j];
    		   sub4[i][j]=Math.abs(x4[i][j]-arr[i][j]);
    		   sum4+=sub4[i][j];
    		   sub5[i][j]=Math.abs(x5[i][j]-arr[i][j]);
    		   sum5+=sub5[i][j];
    		   sub6[i][j]=Math.abs(x6[i][j]-arr[i][j]);
    		   sum6+=sub6[i][j];
    		   sub7[i][j]=Math.abs(x7[i][j]-arr[i][j]);
    		   sum7+=sub7[i][j];
    		   sub8[i][j]=Math.abs(x8[i][j]-arr[i][j]);
    		   sum8+=sub8[i][j];
           }
       }
    		   int p1 = Math.min(sum1,sum2);
    		   int p2 = Math.min(sum3, sum4);
    		   int p3 = Math.min(sum5, sum6);
    		   int p4 = Math.min(sum7, sum8);
    		   int q1 = Math.min(p1, p2);
    		   int q2 = Math.min(p3,p4);
    		   int q = Math.min(q1, q2);
    		   System.out.println(q);
 
        }
    }