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 man with a stick herds cows down a gravel road'. Count the number of consonants in the given sentence.

SOLUTION: 25

PROBLEM: Sentence: 'a bunch of hotdogs cooking on a grill'. Count the number of vowels in the given sentence.

SOLUTION: 11

PROBLEM: Sentence: 'a polar bear stands a small rock in the middle of surrounding water'. Count the number of vowels in the given sentence.

SOLUTION:
20