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 snowboarder does a jump on a dark course'. Count the number of vowels in the given sentence.
Example Output: 15

Example Input: Sentence: 'a clock stands on the curb of a busy street'. Count the number of vowels in the given sentence.
Example Output: 11

Example Input: Sentence: 'a man flying a kite on a sunny day'. Count the number of vowels in the given sentence.
Example Output:
10