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: 'an image of a clock that is next to a group of books'. Count the number of consonants in the given sentence.
Example Output: 23

Example Input: Sentence: 'a clock sitting in the middle of a road'. Count the number of consonants in the given sentence.
Example Output: 19

Example Input: Sentence: 'a boat shaped cake sitting on to of a blue surface'. Count the number of consonants in the given sentence.
Example Output:
22