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 train with several cars is going around a corner'. Count the number of consonants in the given sentence.

SOLUTION: 24

PROBLEM: Sentence: 'a black cat is sitting near a mirror and a picture'. Count the number of consonants in the given sentence.

SOLUTION: 24

PROBLEM: Sentence: 'woman using laptop on cluttered school desk, with a netbook'. Count the number of consonants in the given sentence.

SOLUTION:
31