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: 'there are three computers on the desk, two of which are turned on'. Count the number of consonants in the given sentence.
32

Sentence: 'a zebra stands next to a tree on gravel'. Count the number of consonants in the given sentence.

19