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 is a man standing on the train'. Count the number of consonants in the given sentence.

SOLUTION: 18

PROBLEM: Sentence: 'the buses are waiting in line for pickup'. Count the number of consonants in the given sentence.

SOLUTION: 19

PROBLEM: Sentence: 'a couple of small kids sit in front of a projector'. Count the number of consonants in the given sentence.

SOLUTION:
25