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 riding a wind board in the middle of an ocean'. Count the number of vowels in the given sentence.

SOLUTION: 17

PROBLEM: Sentence: 'elephant herd, in a line, walking across savanna'. Count the number of vowels in the given sentence.

SOLUTION: 15

PROBLEM: Sentence: 'a tree and fire hydrant in front of a bank'. Count the number of vowels in the given sentence.

SOLUTION:
12