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 boy swinging his bat towards a baseball'. Count the number of vowels in the given sentence.
12

Sentence: 'a while express bus at the side of a road near a stadium'. Count the number of consonants in the given sentence.
24

Sentence: 'five snowboarders doing tricks on the snowboard course'. Count the number of vowels in the given sentence.

17