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 man with a stick herds cows down a gravel road'. Count the number of consonants in the given sentence.
Example Output: 25

Example Input: Sentence: 'two people in bed using their apple laptops'. Count the number of consonants in the given sentence.
Example Output: 22

Example Input: Sentence: 'man snowboarding downhill on a bleak overcast day'. Count the number of consonants in the given sentence.
Example Output:
27