How many hours do we have until New Year at M o'clock (24-hour notation) on 30th, December?

Constraints

* 1≤M≤23
* M is an integer.

Input

Input is given from Standard Input in the following format:


M


Output

If we have x hours until New Year at M o'clock on 30th, December, print x.

Examples

Input

21


Output

27


Input

12


Output

36
import java.util.Scanner;
public class Main{
    public static void main(String[] args){
        Scanner sc = new Scanner(System.in);
        int m = sc.nextInt();
        int ans = 24 + (24-m);
        System.out.println(ans);
    }
}
