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

SOLUTION: 16

PROBLEM: Sentence: 'father and son wait on their bicycle at a traffic light'. Count the number of vowels in the given sentence.

SOLUTION: 16

PROBLEM: Sentence: 'the man and woman are hugging under an umbrella near the water'. Count the number of vowels in the given sentence.

SOLUTION:
20