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 int maxHourglassSum(int[][] arr) { int maxSum = Integer.MIN_VALUE;

    for (int i = 0; i < 4; i++) { // we go from row 0 to 3
        for (int j = 0; j < 4; j++) { // the same with col we go 0 to 3
            int hourglassSum = (
                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]
            );

            maxSum = Math.max(maxSum, hourglassSum);
        }
    }
    return maxSum;
}

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

    for (int i = 0; i < 6; i++) {
        for (int j = 0; j < 6; j++) {
            arr[i][j] = scanner.nextInt();
        }
    }

    scanner.close();
    System.out.println(maxHourglassSum(arr));
}

}