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 about to take a swing at a tennis ball'. Count the number of vowels in the given sentence.

SOLUTION: 15

PROBLEM: Sentence: 'a zebra with a gazelle in the background in a grassy field'. Count the number of vowels in the given sentence.

SOLUTION: 18

PROBLEM: Sentence: 'the human traffic at the top of a ski lift'. Count the number of vowels in the given sentence.

SOLUTION:
12