#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 */   
    vector< vector<int> > a(3,vector<int>(3));
    vector<int> arr(10);
    int sum=100,diff=0;
    for(int a_i = 0;a_i < 3;a_i++){
       for(int a_j = 0;a_j < 3;a_j++){
          cin >> a[a_i][a_j];
          
       }
    }
    int a1[3][3] = {  
   {8, 1, 6} ,   
   {3, 5, 7} ,  
   {4, 9, 2}   
};
    int a2[3][3] = {  
   {8, 3, 4} ,   
   {1, 5, 9} ,  
   {6, 7, 2}   
};
    int a3[3][3] = {  
   {4, 3, 8} ,   
   {9, 5, 1} ,  
   {2, 7, 6}   
};
    int a4[3][3] = {  
   {4, 9, 2} ,   
   {3, 5, 7} ,  
   {8, 1, 6}   
};
    int a5[3][3] = {  
   {2, 9, 4} ,   
   {7, 5, 3} ,  
   {6, 1, 8}   
};
    int a6[3][3] = {  
   {2, 7, 6} ,   
   {9, 5, 1} ,  
   {4, 3, 8}   
};
    int a7[3][3] = {  
   {6, 7, 2} ,   
   {1, 5, 9} ,  
   {8, 3, 4}   
};
    int a8[3][3] = {  
   {6, 1, 8} ,   
   {7, 5, 3} ,  
   {2, 9, 4}   
};
    
    for(int i=0; i<3; i++)
	{
		for(int j=0; j<3; j++)
		{
			diff= diff +abs(a[i][j]-a1[i][j]);
            
            
		}
	}
    if(diff<sum){
        sum=diff;
        diff=0;
    }
    else{
        diff=0;
    }
    for(int i2=0; i2<3; i2++)
	{
		for(int j=0; j<3; j++)
		{
			diff= diff +abs(a[i2][j]-a2[i2][j]);
            
            
		}
	}
    if(diff<sum){
        sum=diff;
        diff=0;
    }
    else{
        diff=0;
    }
    for(int i3=0; i3<3; i3++)
	{
		for(int j=0; j<3; j++)
		{
			diff= diff +abs(a[i3][j]-a3[i3][j]);
            
            
		}
	}
    if(diff<sum){
        sum=diff;
        diff=0;
    }
    else{
        diff=0;
    }
    for(int i4=0; i4<3; i4++)
	{
		for(int j=0; j<3; j++)
		{
			diff= diff +abs(a[i4][j]-a4[i4][j]);
            
            
		}
	}
    if(diff<sum){
        sum=diff;
        diff=0;
    }
    else{
        diff=0;
    }
    for(int i5=0; i5<3; i5++)
	{
		for(int j=0; j<3; j++)
		{
			diff= diff +abs(a[i5][j]-a5[i5][j]);
            
            
		}
	}
    if(diff<sum){
        sum=diff;
        diff=0;
    }
    else{
        diff=0;
    }
    for(int i6=0; i6<3; i6++)
	{
		for(int j=0; j<3; j++)
		{
			diff= diff +abs(a[i6][j]-a6[i6][j]);
            
            
		}
	}
    if(diff<sum){
        sum=diff;
        diff=0;
    }
    else{
        diff=0;
    }
    for(int i7=0; i7<3; i7++)
	{
		for(int j=0; j<3; j++)
		{
			diff= diff +abs(a[i7][j]-a7[i7][j]);
            
            
		}
	}
    if(diff<sum){
        sum=diff;
        diff=0;
    }
    else{
        diff=0;
    }
    for(int i8=0; i8<3; i8++)
	{
		for(int j=0; j<3; j++)
		{
			diff= diff +abs(a[i8][j]-a8[i8][j]);
            
            
		}
	}
    if(diff<sum){
        sum=diff;
        diff=0;
    }
    else{
        diff=0;
    }
    
    cout<<sum<<endl;
    return 0;
}