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


int main() {
    /* Enter your code here. Read input from STDIN. Print output to STDOUT */   
    
    
        int matrix[3][3];
    int store[9]={};
    int count=0,flag=0,count1=0,count2=0,max=0;;
    int answer=15;
    int check[8][9]={{8,1,6,3,5,7,4,9,2},{6,1,8,7,5,3,2,9,4},
				{4,9,2,3,5,7,8,1,6},{2,9,4,7,5,3,6,1,8},{8,3,4,1,5,9,6,7,2},
				{4,3,8,9,5,1,2,7,6},{6,7,2,1,5,9,8,3,4},{2,7,6,9,5,1,4,3,8}};
    
    for(int i=0;i<3;i++)
    {
    	
    	
    	for(int y=0;y<3;y++)
    	{
    		cin>>matrix[i][y];
			store[count]=matrix[i][y];
			count++;
			
    	}
    	
	}
	
	
	for(int i=0;i<8;i++)
    {
    	
    	flag=0;
    	for(int y=0;y<9;y++)
    	{
    		flag=flag+int(abs(check[i][y]-store[y]));
			
    	}
    	if(flag>answer)
    	{
    		
    		answer=flag;
		}
    	
	}
	
	for(int i=0;i<8;i++)
    {
    	
    	flag=0;
    	for(int y=0;y<9;y++)
    	{
    		flag=flag+int(abs(check[i][y]-store[y]));
			
    	}
    	if(flag<answer)
    	{
    		
    		answer=flag;
		}
    	
	}
		

	
	
	

	cout<<answer<<endl;
	
    
    
    return 0;
}