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 riding a ramp on a skateboard at a park'. Count the number of consonants in the given sentence.
Example Output: 20

Example Input: Sentence: 'a woman getting ready to hit a tennis ball on a court'. Count the number of vowels in the given sentence.
Example Output: 17

Example Input: Sentence: 'a cat that is half in a toilet'. Count the number of vowels in the given sentence.
Example Output:
10