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 herd of sheep walking across a green field'. Count the number of consonants in the given sentence.
Example Output: 22

Example Input: Sentence: 'two people tgat are having fun skiing down a mountain slope'. Count the number of consonants in the given sentence.
Example Output: 29

Example Input: Sentence: 'a sidewalk with a light pole covered in rain water'. Count the number of consonants in the given sentence.
Example Output:
24