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 tennis player playing on a tennis court'. Count the number of consonants in the given sentence.
Example Output: 21

Example Input: Sentence: 'a dinner plate with broccoli and steak and beans'. Count the number of consonants in the given sentence.
Example Output: 25

Example Input: Sentence: 'a few snow skiers coming down the slope'. Count the number of consonants in the given sentence.
Example Output:
21