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: 'some people are looking at two giraffes at a zoo'. Count the number of consonants in the given sentence.
Example Output: 20

Example Input: Sentence: 'five snowboarders doing tricks on the snowboard course'. Count the number of vowels in the given sentence.
Example Output: 17

Example Input: Sentence: 'a picture of a well lit room with a bed and computer'. Count the number of consonants in the given sentence.
Example Output:
24