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: 'an open refrigerator filled with lots of food'. Count the number of consonants in the given sentence.

SOLUTION: 23

PROBLEM: Sentence: 'a man wearing a white tie with black squares on it'. Count the number of consonants in the given sentence.

SOLUTION: 23

PROBLEM: Sentence: 'those trains are lined up along each other'. Count the number of vowels in the given sentence.

SOLUTION:
15