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: 'many people stand on a sidewalk holding umbrellas'. Count the number of consonants in the given sentence.
Example Output: 27

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: 'group of people outside sitting on benches next to a building'. Count the number of consonants in the given sentence.
Example Output:
30