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 black bird sits in a flower boy'. Count the number of consonants in the given sentence.
Example Output: 17

Example Input: Sentence: 'two cows relax and graze in a large grassy pasture'. Count the number of consonants in the given sentence.
Example Output: 26

Example Input: Sentence: 'several horse riders are along the ocean shore'. Count the number of consonants in the given sentence.
Example Output:
22