TASK DEFINITION: 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.
PROBLEM: Sentence: 'the bird with purple feathers is sitting on a branch'. Count the number of consonants in the given sentence.

SOLUTION: 29

PROBLEM: Sentence: 'two giraffe and two gazelle in dry vegetation'. Count the number of consonants in the given sentence.

SOLUTION: 23

PROBLEM: Sentence: 'a red stop sign sitting under a couple of green street signs'. Count the number of consonants in the given sentence.

SOLUTION:
31