2- (25 points) Write a Python script that gets a sentence from user. It then iterates over the words in the sentence just once and returns a dictionary which shows how many words in the sentence start with each vowel. (Lower or upper case does not matter. Besides, consider the subject T and the article 'a' as words not letters) For example: Please enter a sentence: The ultimate measure of a man is not where he stands in moments of comfort and convenience, but where he stands at times of challenge and controversy. result = {'a': 4, 'o': 3, 'u': 1, 'i': 2, 'e': 0}