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.

[EX Q]: Sentence: 'a cow crosses a stream while sun rays shine down on the water'. Count the number of vowels in the given sentence.
[EX A]: 18

[EX Q]: Sentence: 'a black bear standing on the ground with grass'. Count the number of vowels in the given sentence.
[EX A]: 12

[EX Q]: Sentence: 'a lone zebra grazing in a grassy field'. Count the number of consonants in the given sentence.
[EX A]:
19