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 skier flying down a snow covered hill into a pool'. Count the number of consonants in the given sentence.
Example Output: 25

Example Input: Sentence: 'a desktop computer that is sitting on a desk'. Count the number of consonants in the given sentence.
Example Output: 23

Example Input: Sentence: 'an outdoor gathering of people with political signs'. Count the number of consonants in the given sentence.
Example Output:
26