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 sys
import os

def main():
  N = input()
  hour_ = 24 - N
  hour = 24 + hour_
  print hour

if __name__ == '__main__':
  main()