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: 'the two  grey elephants was trailing each other across the road'. Count the number of vowels in the given sentence.

SOLUTION: 19

PROBLEM: Sentence: 'a crowd of people at a festival type event in front of a clock tower'. Count the number of consonants in the given sentence.

SOLUTION: 33

PROBLEM: Sentence: 'a toddler stands beside a fire hydrant on a suburban street'. Count the number of vowels in the given sentence.

SOLUTION:
18