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


int main() {
  int a[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}};

            
  int b[9],i,cc,sol=100000,j;
  cc=0;
  for(i=0;i<9;i++){
  	cin>>b[i];
  }
            
        
    for (i=0;i<8;i++){
    	cc=0;
    	for(j=0;j<9;j++){
    		cc=cc+int(abs(a[i][j]-b[j]));
		}
		if(cc<sol){
		
        sol=cc;
	}}
    
        
cout<<sol;
        
    return 0;
}