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.

Sentence: 'a double-decker red bus on a london street'. Count the number of vowels in the given sentence.
14

Sentence: 'a bunch of people walking near some tall steps'. Count the number of vowels in the given sentence.
14

Sentence: 'a red double-decker bus next to a bus stop'. Count the number of vowels in the given sentence.

13