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 woman throws up the tennis ball to serve'. Count the number of vowels in the given sentence.
Example Output: 12

Example Input: Sentence: 'a man standing on a surf board, holding an oar'. Count the number of consonants in the given sentence.
Example Output: 22

Example Input: Sentence: 'an attractive young woman on a motorcycle with her friend close by'. Count the number of vowels in the given sentence.
Example Output:
20