Sequence

import java.util.Scanner;
import java.util.Stack;

public class Sequence {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);

        String[] numbers = scanner.nextLine().split(" ");

        int K = Integer.parseInt(numbers[0]);
        int N = Integer.parseInt(numbers[1]);
        Stack<Integer> stack = new Stack<Integer>();

        int one = K;
        int two = K + 1;
        int three = (K * 2) + 1;
        int four = K + 2;
        int five = K + 2;
        int six = (2 * (K + 1) + 1);
        int seven = K + 3;

        int[] arr = {one, two, three, four, five, six, seven};

        int j = 0;
        for (int i = 0; i < N; i++) {
            stack.push(arr[j]);
            j++;
            if (j == 7) {
                j = 0;
            }
        }
        System.out.println(stack.pop());
    }
}