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 teddy bear that is sitting on a tree branch'. Count the number of consonants in the given sentence.
Example Output: 23

Example Input: Sentence: 'a man gives children food to feed an elephant'. Count the number of consonants in the given sentence.
Example Output: 22

Example Input: Sentence: 'a green light on an empty suburban road'. Count the number of consonants in the given sentence.
Example Output:
20