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: 'two traffic signs are pictured in front of a sky background'. Count the number of vowels in the given sentence.

SOLUTION: 16

PROBLEM: Sentence: 'a group of people sitting at a table writing on papers'. Count the number of consonants in the given sentence.

SOLUTION: 26

PROBLEM: Sentence: 'a group of antique items sitting in front of a penne station sign'. Count the number of consonants in the given sentence.

SOLUTION:
31