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 small plane sits at the end of a small runway'. Count the number of vowels in the given sentence.
Example Output: 13

Example Input: Sentence: 'a slice of pepperoni pizza sits on a paper plate'. Count the number of vowels in the given sentence.
Example Output: 17

Example Input: Sentence: 'a laptop sitting on a desk with a mouse'. Count the number of vowels in the given sentence.
Example Output:
13