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 person riding a motorcycle on sandy hills'. Count the number of consonants in the given sentence.
Example Output: 24

Example Input: Sentence: 'some people in line at a small stand'. Count the number of consonants in the given sentence.
Example Output: 17

Example Input: Sentence: 'a couple cutting their wedding cake together with a knife in their hands'. Count the number of consonants in the given sentence.
Example Output:
37