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.*;

public class Main{
  
  public static void main (String[] args){
  
  Scanner scanner = new  Scanner (System.in);
    
  int M = scanner.nextInt();
    
  int hour = 24-M;
  
  System.out.println(hour+24);
  
  }
}