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: 'an older man smiles while picking green bananas'. Count the number of vowels in the given sentence.
15

Sentence: 'a brown dog greeting a lamb on a green field'. Count the number of vowels in the given sentence.
14

Sentence: 'a small boy sits in his car seat eating a sandwich'. Count the number of vowels in the given sentence.

15