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 couple of giraffe standing next to each other'. Count the number of vowels in the given sentence.
Example Output: 16

Example Input: Sentence: 'a plate topped with an apple and an orange next to a book'. Count the number of consonants in the given sentence.
Example Output: 26

Example Input: Sentence: 'two people tgat are having fun skiing down a mountain slope'. Count the number of consonants in the given sentence.
Example Output:
29