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 doughnut sitting next to a cup of coffee at restaurant'. Count the number of consonants in the given sentence.

SOLUTION: 27

PROBLEM: Sentence: 'a cow crosses a stream while sun rays shine down on the water'. Count the number of vowels in the given sentence.

SOLUTION: 18

PROBLEM: Sentence: 'a large man sitting on top if his motorcycle'. Count the number of vowels in the given sentence.

SOLUTION:
13