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 man playing a guitar and other musical instruments'. Count the number of vowels in the given sentence.

SOLUTION: 17

PROBLEM: Sentence: 'a woman with a green striped umbrella crosses a street past a brightly painted truck'. Count the number of vowels in the given sentence.

SOLUTION: 24

PROBLEM: Sentence: 'a modern electric train travels through rural countryside'. Count the number of vowels in the given sentence.

SOLUTION:
18