def right_words(list, num):
	result = []
	
	#iterating through the list and stating the condition that length of values in list must be equal to num for it to append to the result list, we have:
		
	for values in list:
		if len(values) == num:
			result.append(values)
	return result
print(right_words(["cat", "heart", "ace", "bean"], 3))