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