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 bus is sitting parked under a roof'. Count the number of consonants in the given sentence.
Example Output: 17

Example Input: Sentence: 'a group of people sitting at a table writing on papers'. Count the number of consonants in the given sentence.
Example Output: 26

Example Input: Sentence: 'a green umbrella sitting over two tables with chairs'. Count the number of consonants in the given sentence.
Example Output:
28