Day11.java

import java.io.*;
import java.util.*;
import java.util.stream.*;
import static java.util.stream.Collectors.toList;



public class Day11 {
    public static void main(String[] args) throws IOException {
        BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(System.in));

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

        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);
            }
        });

        int highest = -63;
        for (int i = 0; i < arr.size() - 2; i++) {
            for (int j = 0; j < arr.size() - 2; j++) {
                int sum = arr.get(i).get(j);
                sum += arr.get(i).get(j + 1);
                sum += arr.get(i).get(j + 2);
                sum += arr.get(i + 1).get(j + 1);
                sum += arr.get(i + 2).get(j);
                sum += arr.get(i + 2).get(j + 1);
                sum += arr.get(i + 2).get(j + 2);
                // System.out.printf("%d ", sum);   // array of sums
                if (highest < sum) {
                    highest = sum;
                }
            }
        }
        
        System.out.println(highest);

        bufferedReader.close();
    }
}