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 jetliner sitting on top of an airport tarmac'. Count the number of vowels in the given sentence.
15

Sentence: 'a couple of vases that are on top of a table'. Count the number of vowels in the given sentence.
16

Sentence: 'a street sign with trees in the background'. Count the number of vowels in the given sentence.

12