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 while express bus at the side of a road near a stadium'. Count the number of consonants in the given sentence.
Example Output: 24

Example Input: Sentence: 'a herd of sheep are walking up a muddy hill next to a parked minivan'. Count the number of vowels in the given sentence.
Example Output: 21

Example Input: Sentence: 'a calf walks on a street near a truck'. Count the number of consonants in the given sentence.
Example Output:
18