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.
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Question: Sentence: 'a guy in a white shirt, jeans, and a baseball hat flipping on a skate board'. Count the number of vowels in the given sentence.

Answer: 23


Question: Sentence: 'an old train next to some empty train tracks'. Count the number of vowels in the given sentence.

Answer: 12


Question: Sentence: 'a dog catching a frisbee in a grassy field'. Count the number of vowels in the given sentence.

Answer:
13