def extract_max(input):
	import re 
	 
	numbers = re.findall('\d+',input) 
	numbers = map(int,numbers) 
	return max(numbers)
def is_not_prime(n):
    import math
    
    result = False
    for i in range(2,int(math.sqrt(n)) + 1):
        if n % i == 0:
            result = True
    return result