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: 'an old train next to some empty train tracks'. Count the number of vowels in the given sentence.

Ex Output:
12


Ex Input:
Sentence: 'a couple of horses are standing in a field'. Count the number of vowels in the given sentence.

Ex Output:
15


Ex Input:
Sentence: 'a fire hydrant sits nearly covered by plant overgrowth'. Count the number of vowels in the given sentence.

Ex Output:

14