import java.io.*;
import java.util.*;

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[][] arr=new int[3][3];
        for(int i=0;i<3;i++)
            {
            for(int j=0;j<3;j++)
                arr[i][j]=s.nextInt();
        }
        int[] outr_arr={arr[0][0],arr[1][0],arr[2][0],arr[2][1],arr[2][2],arr[1][2],arr[0][2],arr[0][1]};
        int[] other={4,3,8,1,6,7,2,9};
        int[] other1={8,3,4,9,2,7,6,1};
        int[] other2={2,7,6,1,8,3,4,9};
        int[] other3={6,7,2,9,4,3,8,1};
        
        int c=0,min=100;
        for(int i=0;i<4;i++)
            {
            c=Math.abs(5-arr[1][1]);
            for(int j=0;j<8;j++)
                {
                if(outr_arr[j]!=other[(j+(i*2))%8])
                    {
                    c+=Math.abs(outr_arr[j]-other[(j+(i*2))%8]);
                }
            }
            if(min>c)
                min=c;
        }
        for(int i=0;i<4;i++)
            {
            c=Math.abs(5-arr[1][1]);
            for(int j=0;j<8;j++)
                {
                if(outr_arr[j]!=other1[(j+(i*2))%8])
                    {
                    c+=Math.abs(outr_arr[j]-other1[(j+(i*2))%8]);
                }
            }
            if(min>c)
                min=c;
        }
        for(int i=0;i<4;i++)
            {
            c=Math.abs(5-arr[1][1]);
            for(int j=0;j<8;j++)
                {
                if(outr_arr[j]!=other2[(j+(i*2))%8])
                    {
                    c+=Math.abs(outr_arr[j]-other2[(j+(i*2))%8]);
                }
            }
            if(min>c)
                min=c;
        }
        for(int i=0;i<4;i++)
            {
            c=Math.abs(5-arr[1][1]);
            for(int j=0;j<8;j++)
                {
                if(outr_arr[j]!=other3[(j+(i*2))%8])
                    {
                    c+=Math.abs(outr_arr[j]-other3[(j+(i*2))%8]);
                }
            }
            if(min>c)
            min=c;
        }
        System.out.println(min);
    }
}