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: 'three black cows standing next to each other on a field'. Count the number of vowels in the given sentence.

SOLUTION: 16

PROBLEM: Sentence: 'a group of kids pose in front of a pizza'. Count the number of consonants in the given sentence.

SOLUTION: 18

PROBLEM: Sentence: 'three guys sitting on the couch watching some television'. Count the number of vowels in the given sentence.

SOLUTION:
18