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: 'groups of people in a field sitting down, standing and walking, with tent areas in the background'. Count the number of vowels in the given sentence.
28

Sentence: 'three people sitting on a park bench waving at camera'. Count the number of vowels in the given sentence.
17

Sentence: 'a young boy smiling while wearing a catchers mitt'. Count the number of vowels in the given sentence.

15