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: 'a brown dog greeting a lamb on a green field'. Count the number of vowels in the given sentence.
[EX A]: 14

[EX Q]: Sentence: 'men are watching an outdoor baseball game behind the batter's cage'. Count the number of vowels in the given sentence.
[EX A]: 22

[EX Q]: Sentence: 'multiple people in helmets skateboarding down a hill'. Count the number of vowels in the given sentence.
[EX A]:
17