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 giraffe wanders through the plains, searching for a tall tree to graze on'. Count the number of consonants in the given sentence.
38

Sentence: 'a teenager on a blue skateboard has his arm in the air'. Count the number of consonants in the given sentence.
23

Sentence: 'an emoty commuter train station on a cloudy day'. Count the number of consonants in the given sentence.

23