import java.util.*;

public class Solution { public static void main(String[] args) { Scanner sc = new Scanner(System.in); int[][] arr = new int[6][6];

    // Reading 6x6 array
    for (int i = 0; i < 6; i++) {
        for (int j = 0; j < 6; j++) {
            arr[i][j] = sc.nextInt();
        }
    }

    int maxSum = Integer.MIN_VALUE; // To handle negative numbers too

    // Loop through possible hourglass centers
    for (int i = 1; i < 5; i++) {
        for (int j = 1; j < 5; j++) {
            int sum = arr[i][j]                // middle
                    + arr[i-1][j-1] + arr[i-1][j] + arr[i-1][j+1] // top
                    + arr[i+1][j-1] + arr[i+1][j] + arr[i+1][j+1]; // bottom

            maxSum = Math.max(maxSum, sum);
        }
    }

    System.out.println(maxSum);
}

}