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 baseball game in action with the pitcher throwing the ball'. Count the number of vowels in the given sentence.
Example Output: 18

Example Input: Sentence: 'a boy swinging at a tennis ball with a racquet'. Count the number of vowels in the given sentence.
Example Output: 14

Example Input: Sentence: 'a person walking near a stop sign on a city street'. Count the number of vowels in the given sentence.
Example Output:
15