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 glass of guinness beer and a teddy bear on a table'. Count the number of vowels in the given sentence.
Example Output: 17

Example Input: Sentence: 'a couple of vases that are on top of a table'. Count the number of vowels in the given sentence.
Example Output: 16

Example Input: Sentence: 'a couple of men bent over on a tennis court holding racquets'. Count the number of vowels in the given sentence.
Example Output:
20