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 dirty nasty toilet that is broken in half'. Count the number of vowels in the given sentence.
Example Output: 12

Example Input: Sentence: 'a neon sign on the wall for a hamburger restaurant'. Count the number of consonants in the given sentence.
Example Output: 25

Example Input: Sentence: 'lots of sheep are standing in a field'. Count the number of vowels in the given sentence.
Example Output:
12