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 young man playing baseball swings at home plate'. Count the number of vowels in the given sentence.
Example Output: 15

Example Input: Sentence: 'three video games sitting along side a refrigerator'. Count the number of consonants in the given sentence.
Example Output: 25

Example Input: Sentence: 'some people crossing a street with a big bus in it'. Count the number of vowels in the given sentence.
Example Output:
16