#include <map>
#include <set>
#include <list>
#include <cmath>
#include <ctime>
#include <deque>
#include <queue>
#include <stack>
#include <string>
#include <bitset>
#include <cstdio>
#include <limits>
#include <vector>
#include <climits>
#include <cstring>
#include <cstdlib>
#include <fstream>
#include <numeric>
#include <sstream>
#include <iostream>
#include <algorithm>
using namespace std;

int main(){
    vector< vector<int> > arr(6,vector<int>(6));
    for(int arr_i = 0;arr_i < 6;arr_i++){
       for(int arr_j = 0;arr_j < 6;arr_j++){
          cin >> arr[arr_i][arr_j];
       }
    }

    vector<int> res;
    res.reserve(18);

    for(unsigned int j=0; j<4;++j){
        for(unsigned int i=0; i<4;++i){
            res.push_back(arr[i][j]+arr[i][j+1]+arr[i][j+2]+
                             arr[i+1][j+1]+
                    arr[i+2][j]+arr[i+2][j+1]+arr[i+2][j+2]);
        }
    }
    cout<<*max_element(res.begin(),res.end())<<endl;

    return 0;
}