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.

[EX Q]: Sentence: 'pedestrians pass by a stop sign, some holding surfboards'. Count the number of vowels in the given sentence.
[EX A]: 15

[EX Q]: Sentence: 'a man and a woman with smiles behind tennis racquets'. Count the number of vowels in the given sentence.
[EX A]: 16

[EX Q]: Sentence: 'a crew of people looking at an airplane'. Count the number of vowels in the given sentence.
[EX A]:
15