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: 'a person is in the snow on a board'. Count the number of consonants in the given sentence.
Example Output: 15

Example Input: Sentence: 'two men are standing next to a brownish black elephant'. Count the number of vowels in the given sentence.
Example Output: 15

Example Input: Sentence: 'a large purple kite is being flown in a park'. Count the number of consonants in the given sentence.
Example Output:
21