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 person skiing down a steep snowy hill'. Count the number of vowels in the given sentence.
Example Output: 11

Example Input: Sentence: 'a small child sitting in front of a pizza with a cutter in front'. Count the number of consonants in the given sentence.
Example Output: 34

Example Input: Sentence: 'an outdoor event with a lot if art on dislpay'. Count the number of consonants in the given sentence.
Example Output:
21