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: 'an older man smiles while picking green bananas'. Count the number of vowels in the given sentence.

SOLUTION: 15

PROBLEM: Sentence: 'a stop sign on the side of the road has a paper taped on it'. Count the number of consonants in the given sentence.

SOLUTION: 26

PROBLEM: Sentence: 'some boys are wearing green and red vests and ties'. Count the number of vowels in the given sentence.

SOLUTION:
16