import java.math.*;
import java.security.*;
import java.text.*;
import java.util.*;
import java.util.concurrent.*;
import java.util.function.*;
import java.util.regex.*;
import java.util.stream.*;
import static java.util.stream.Collectors.joining;
import static java.util.stream.Collectors.toList;



public class Solution {
    public static void main(String[] args) throws IOException {
        BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(System.in));

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

        int maxSum = Integer.MIN_VALUE;

        IntStream.range(0, 6).forEach(i -> {
            try {
                arr.add(
                        Stream.of(bufferedReader.readLine().replaceAll("\\s+$", "").split(" "))
                        .map(Integer::parseInt)
                        .collect(toList())
                );
            } catch (IOException ex) {
                throw new RuntimeException(ex);
            }
        });
        
        for (int indexI = 0; indexI <= arr.size() - 3; indexI++) {
            for(int indexJ = 0; indexJ <= arr.get(indexI).size() - 3; indexJ++){
                int hourglassSum = arr.get(indexI).get(indexJ) + 
                                   arr.get(indexI).get(indexJ + 1) + 
                                   arr.get(indexI).get(indexJ + 2) + 
                                   arr.get(indexI + 1).get(indexJ + 1) + 
                                   arr.get(indexI + 2).get(indexJ) + 
                                   arr.get(indexI + 2).get(indexJ + 1) + 
                                   arr.get(indexI + 2).get(indexJ + 2);
                if (hourglassSum > maxSum) {
                    maxSum = hourglassSum;
                }
            }
        }

        System.out.println(maxSum);
undefined