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 boat with a man fishing on it on a lake'. Count the number of consonants in the given sentence.
Example Output: 17

Example Input: Sentence: 'a bathroom mirror with a reflection of a door and sink in front of it'. Count the number of vowels in the given sentence.
Example Output: 22

Example Input: Sentence: 'a man that is skiing down a mountain'. Count the number of vowels in the given sentence.
Example Output:
12