import java.io.*;
import java.math.*;
import java.security.*;
import java.text.*;
import java.util.*;
import java.util.concurrent.*;
import java.util.regex.*;



public class Solution {
    
    
    public static void winnable(List<List<Integer>> arr){
        
        int max_sum = Integer.MIN_VALUE;
        
        for (int i = 0; i <= 3; i++) {
            for (int j = 0; j <= 3; j++) {
                int current_sum = arr.get(i).get(j) + arr.get(i).get(j+1)+ arr.get(i).get(j+2)
                                  +arr.get(i+1).get(j+1)+
                                  arr.get(i+2).get(j) + arr.get(i+2).get(j+1)+ arr.get(i+2).get(j+2);
                                  
                if(current_sum>max_sum){
                    max_sum = current_sum;

                }                   
            }
        }
        
        System.out.println(max_sum);
        
        
    }
    
    public static void main(String[] args) throws IOException {
        BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(System.in));

        List<List<Integer>> arr = new ArrayList<>();
        
        for (int i = 0; i < 6; i++) {
            String[] arrRowTempItems = bufferedReader.readLine().replaceAll("\\s+$", "").split(" ");

            List<Integer> arrRowItems = new ArrayList<>();

            for (int j = 0; j < 6; j++) {
                int arrItem = Integer.parseInt(arrRowTempItems[j]);
                arrRowItems.add(arrItem);
            }

            arr.add(arrRowItems);
        }

        bufferedReader.close();
        
        winnable(arr);
        
        
    }
}