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.

Example Input: Sentence: 'a man about to take a swing at a tennis ball'. Count the number of vowels in the given sentence.
Example Output: 15

Example Input: Sentence: 'a sail boat lays on it's side on the beach'. Count the number of vowels in the given sentence.
Example Output: 14

Example Input: Sentence: 'several surfers at various stages on the same wave'. Count the number of consonants in the given sentence.
Example Output:
24