In this task, you need to count the number of vowels (letters 'a', 'e', 'i', 'o', 'u') / consonants (all letters other than vowels) in the given sentence.

Ex Input:
Sentence: 'a group of men are watching two men shake hands over a table decorated with american and chinese flags'. Count the number of consonants in the given sentence.

Ex Output:
51


Ex Input:
Sentence: 'a military grade jets flies through clear skies'. Count the number of vowels in the given sentence.

Ex Output:
15


Ex Input:
Sentence: 'a rainy day with people walking on the sidewalks'. Count the number of vowels in the given sentence.

Ex Output:

15