#!/usr/bin/env python3
# -*- coding: utf-8 -*-
"""
Created on Mon Aug 13 13:27:31 2018

@author: olli
"""
ika = int(input('Kuinka vanha olet? '))
if ika >= 0 and ika <= 120:
    print('OK')
else:
    print('Mahdotonta!')
    
    