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 doughnut sitting next to a cup of coffee at restaurant'. Count the number of consonants in the given sentence.

Ex Output:
27

Ex Input:
Sentence: 'a cow crosses a stream while sun rays shine down on the water'. Count the number of vowels in the given sentence.

Ex Output:
18

Ex Input:
Sentence: 'a calf walks on a street near a truck'. Count the number of consonants in the given sentence.

Ex Output:
18