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: 'there are three guys playing with a white frisbee'. Count the number of consonants in the given sentence.

SOLUTION: 25

PROBLEM: Sentence: 'birds are in the water and sticking their heads in'. Count the number of consonants in the given sentence.

SOLUTION: 26

PROBLEM: Sentence: 'a cat sitting down with one eye open'. Count the number of vowels in the given sentence.

SOLUTION:
12