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 black and white picture of a man standing on his skate board'. Count the number of consonants in the given sentence.
Example Output: 31

Example Input: Sentence: 'a man on a green field throwing a baseball'. Count the number of vowels in the given sentence.
Example Output: 14

Example Input: Sentence: 'a cat that is laying down on a couch'. Count the number of consonants in the given sentence.
Example Output:
17