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 stop sign covered with snow in a snowstorm'. Count the number of consonants in the given sentence.
Example Output: 24

Example Input: Sentence: 'an older couple getting married in front of a crowd'. Count the number of vowels in the given sentence.
Example Output: 16

Example Input: Sentence: 'a woman grooming a small brown dog on a counter.'. Count the number of vowels in the given sentence.
Example Output:
15