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 brown and red hen with feathers on grass'. Count the number of vowels in the given sentence.
11

Sentence: 'the four airplanes are flying through the sky'. Count the number of consonants in the given sentence.
25

Sentence: 'cars are waiting for a train to pass in a city intersection'. Count the number of consonants in the given sentence.

28