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 mirror is on a pole by a light'. Count the number of vowels in the given sentence.
Example Output: 10

Example Input: Sentence: 'a fire hydrant and bicycle are covered with snow as they stand next to each other near a street corner'. Count the number of consonants in the given sentence.
Example Output: 53

Example Input: Sentence: 'this person is trying to ski down the snow covered hillside'. Count the number of consonants in the given sentence.
Example Output:
33