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: 'a brown dog greeting a lamb on a green field'. Count the number of vowels in the given sentence.

SOLUTION: 14

PROBLEM: Sentence: 'a bathroom mirror with a reflection of a door and sink in front of it'. Count the number of vowels in the given sentence.

SOLUTION: 22

PROBLEM: Sentence: 'a grey adult cat opens its mouth very wide'. Count the number of consonants in the given sentence.

SOLUTION:
21