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 meal of a peanut butter and jelly sandwich with poprocks mixed in'. Count the number of vowels in the given sentence.
Example Output: 20

Example Input: Sentence: 'a group of sheep with a donkey walking in a parking lot'. Count the number of vowels in the given sentence.
Example Output: 17

Example Input: Sentence: 'a man in white shirt and shorts playing a game of tennis'. Count the number of vowels in the given sentence.
Example Output:
16