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: 'many people walking with umbrellas in hand while it rains'. Count the number of vowels in the given sentence.
17

Sentence: 'a cat that is sleeping on a chair'. Count the number of consonants in the given sentence.
15

Sentence: 'a man in a wetsuit carrying a surfboard to the water'. Count the number of vowels in the given sentence.

17