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
#!/usr/bin/python

import sys

def main(argv):
    line = sys.stdin.readline()
    while line:
        M = int(line.rstrip("\n"))
        print 24 - M + 24

        line = sys.stdin.readline()

if __name__ == "__main__":
    main(sys.argv)