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 cat sleeping on a bed next to a window in a room'. Count the number of consonants in the given sentence.
Example Output: 21

Example Input: Sentence: 'two people are standing next to a giraffe'. Count the number of vowels in the given sentence.
Example Output: 14

Example Input: Sentence: 'three men load wood onto a large train'. Count the number of consonants in the given sentence.
Example Output:
17