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 woman walking past a fence with animals on it'. Count the number of vowels in the given sentence.
Example Output: 15

Example Input: Sentence: 'black and white photo of a large clock located outside'. Count the number of consonants in the given sentence.
Example Output: 27

Example Input: Sentence: 'the side of the train is covered in graffiti'. Count the number of vowels in the given sentence.
Example Output:
15