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 baby playing with a toy and a toothbrush'. Count the number of vowels in the given sentence.
Example Output: 12

Example Input: Sentence: 'a man running and reaching to catch a frisbee on the beach'. Count the number of vowels in the given sentence.
Example Output: 18

Example Input: Sentence: 'a nice kitchen is shown with light coming in a window and black countertops'. Count the number of vowels in the given sentence.
Example Output:
21