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 large plane is flying in the sky'. Count the number of consonants in the given sentence.

SOLUTION: 18

PROBLEM: Sentence: 'a street sign on the edge of a street'. Count the number of vowels in the given sentence.

SOLUTION: 12

PROBLEM: Sentence: 'a train traveling down train tracks next to a forest'. Count the number of vowels in the given sentence.

SOLUTION:
15