def reverse_vowels(str1):
	
	vowels = ""
	for char in str1:
		if char in "aeiouAEIOU":
			vowels += char
	result_string = ""
	for char in str1:
		if char in "aeiouAEIOU":
			result_string += vowels[-1]
			vowels = vowels[:-1]
		else:
			result_string += char
	return result_string
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