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 small room with a fireplace, desk and bed'. Count the number of consonants in the given sentence.
Example Output: 21

Example Input: Sentence: 'a navy man taking a ride on a moped for the first time'. Count the number of vowels in the given sentence.
Example Output: 17

Example Input: Sentence: 'an elephant with a baby elephant grazing in the grass'. Count the number of vowels in the given sentence.
Example Output:
15