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 living room with tv and speakers, sofa and coffee table'. Count the number of vowels in the given sentence.
Example Output: 18

Example Input: Sentence: 'women sitting in chairs in a sunny room'. Count the number of vowels in the given sentence.
Example Output: 12

Example Input: Sentence: 'a small elephant standing on the side of a enclosure'. Count the number of vowels in the given sentence.
Example Output:
17