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 person riding a motorcycle on sandy hills'. Count the number of consonants in the given sentence.
24

Sentence: 'a four lane street in the suburbs'. Count the number of consonants in the given sentence.
16

Sentence: 'many sail boats sail through the water in a row'. Count the number of vowels in the given sentence.

15