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 little kitten playing on a scratching mat'. Count the number of consonants in the given sentence.

SOLUTION: 24

PROBLEM: Sentence: 'many people walking with umbrellas in hand while it rains'. Count the number of vowels in the given sentence.

SOLUTION: 17

PROBLEM: Sentence: 'a man is serving pizza to a customer'. Count the number of consonants in the given sentence.

SOLUTION:
17