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 man sitting in a chair opening empty luggage'. Count the number of vowels in the given sentence.
15

Sentence: 'a table is laid out with several different doughnuts and pastries'. Count the number of vowels in the given sentence.
22

Sentence: 'this train car features a variety of colors and carries passengers'. Count the number of vowels in the given sentence.

22