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 large group of people on the street with some bikes'. Count the number of vowels in the given sentence.
Example Output: 18

Example Input: Sentence: 'a baseball player swings a bat at a game'. Count the number of vowels in the given sentence.
Example Output: 13

Example Input: Sentence: 'a bathroom with four men brushing their teeth'. Count the number of vowels in the given sentence.
Example Output:
14