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 man picks bananas that are still green'. Count the number of vowels in the given sentence.
Example Output: 12

Example Input: Sentence: 'a large group of people on the street with some bikes'. Count the number of vowels in the given sentence.
Example Output: 18

Example Input: Sentence: 'a jetliner sitting on top of an airport tarmac'. Count the number of consonants in the given sentence.
Example Output:
23