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.*;

class Main {
   public static void main(String[] args)
   {
      Scanner scan = new Scanner(System.in);
      int     x    = Integer.parseInt(scan.next());
      int     hour = 24;

      hour = hour + 24 - x;

      System.out.println(hour);
   }
}
