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.

Sentence: 'a broken park bench in the middle of a grassy lawn'. Count the number of consonants in the given sentence.
27

Sentence: 'a group of kids pose in front of a pizza'. Count the number of vowels in the given sentence.
13

Sentence: 'a man waits by the street with an open umbrella in his hand'. Count the number of vowels in the given sentence.

17