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: 'giraffe eating leaves off of a tree in tall grass'. Count the number of vowels in the given sentence.

SOLUTION: 17

PROBLEM: Sentence: 'a man holding a tennis racquet on a tennis court'. Count the number of consonants in the given sentence.

SOLUTION: 23

PROBLEM: Sentence: 'several people are using the sidewalk on this street'. Count the number of vowels in the given sentence.

SOLUTION:
18