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: 'people enjoying the slopes at a ski resort on a sunny day'. Count the number of vowels in the given sentence.
Example Output: 18

Example Input: Sentence: 'a man standing on top of a boat next to a man in a straw hat'. Count the number of vowels in the given sentence.
Example Output: 18

Example Input: Sentence: 'a aluminum soda can with pink flowers on a desk near some papers and a calculator'. Count the number of vowels in the given sentence.
Example Output:
27