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 person with a rain jacket on their bike'. Count the number of vowels in the given sentence.
Example Output: 14

Example Input: Sentence: 'many white birds flying above a river that flows in front of a forest'. Count the number of consonants in the given sentence.
Example Output: 37

Example Input: Sentence: 'a circular dinner plate with a sandwich that is cut in half and a part of an orange peel on the plate'. Count the number of vowels in the given sentence.
Example Output:
31