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 street sign and a traffic light in front of a building'. Count the number of consonants in the given sentence.
Example Output: 29

Example Input: Sentence: 'some kids near a pizza topped with greens'. Count the number of vowels in the given sentence.
Example Output: 13

Example Input: Sentence: 'a field filled full of sheep, grazing and eating in the pasture'. Count the number of vowels in the given sentence.
Example Output:
20