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 bunch of people walking near some tall steps'. Count the number of vowels in the given sentence.
Example Output: 14

Example Input: Sentence: 'a plate of food sitting on top of a table'. Count the number of consonants in the given sentence.
Example Output: 18

Example Input: Sentence: 'a little girl holds a bat while her stuffed piglet lies on the floor'. Count the number of consonants in the given sentence.
Example Output:
35