<image>

Input

The input contains a single integer a (0 ≤ a ≤ 15).

Output

Output a single integer.

Example

Input


3


Output


13
import java.util.Scanner;

public class Main {
    static int[] k = {15, 14, 12, 13, 8, 9, 10, 11, 0, 1, 2, 3, 4, 5, 6, 7};
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        System.out.println(k[scanner.nextInt()]);
    }
}