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){
    
   int n; 

   Scanner sc = new Scanner (System.in);
   n=sc.nextInt();
   
   n=48-n;
 
   System.out.println(n);
  }
}