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.

Example Input: Sentence: 'there are many kites that are being flown over the beach'. Count the number of vowels in the given sentence.
Example Output: 18

Example Input: Sentence: 'a woman with a smile on her face riding a horse'. Count the number of vowels in the given sentence.
Example Output: 16

Example Input: Sentence: 'a couple of yellow and silver airplanes sitting on top of a field'. Count the number of consonants in the given sentence.
Example Output:
31