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 cat that is laying down on a couch'. Count the number of consonants in the given sentence.
Example Output: 17

Example Input: Sentence: 'a person on a soccer field chasing a soccer ball'. Count the number of consonants in the given sentence.
Example Output: 24

Example Input: Sentence: 'there are two zebras that are in a zoo together'. Count the number of consonants in the given sentence.
Example Output:
21