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 bird with a unique black and white beak next to other birds'. Count the number of vowels in the given sentence.
19

Sentence: 'a man riding on the back of a horse'. Count the number of vowels in the given sentence.
11

Sentence: 'a teenager with a hat, necktie and umbrella'. Count the number of consonants in the given sentence.

20