#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 a[3][3];
    for(int i=0;i<3;i++)
        {
        for(int j=0;j<3;j++)
            {
            cin>>a[3][3];
        }
    }
    
    return 0;
    cout<<"5";
}