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

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