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 police officer is standing on a street corner'. Count the number of vowels in the given sentence.
Example Output: 16

Example Input: Sentence: 'a teddy bear that is sitting on a tree branch'. Count the number of consonants in the given sentence.
Example Output: 23

Example Input: Sentence: 'a dog laying in bed all covered up with the blanket '. Count the number of vowels in the given sentence.
Example Output:
15