TASK DEFINITION: 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.
PROBLEM: Sentence: 'a man riding on the back of a horse'. Count the number of vowels in the given sentence.

SOLUTION: 11

PROBLEM: Sentence: 'a man is holding up a snowboard with the word "source" written on it'. Count the number of consonants in the given sentence.

SOLUTION: 33

PROBLEM: Sentence: 'a cat sits on top of a black car'. Count the number of vowels in the given sentence.

SOLUTION:
9