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: 'pastries and coffee on a plastic tray on a table'. Count the number of vowels in the given sentence.
Example Output: 16

Example Input: Sentence: 'a pizza that is on a platter on a table'. Count the number of vowels in the given sentence.
Example Output: 13

Example Input: Sentence: 'a man is standing with his hands in his pockets while a woman with a purple hat is holding an umbrella over his head'. Count the number of vowels in the given sentence.
Example Output:
34