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 herd of sheep walking across a green field'. Count the number of consonants in the given sentence.
Example Output: 22

Example Input: Sentence: 'a woman in a red jacket with her mouth open standing in front of a bus'. Count the number of consonants in the given sentence.
Example Output: 34

Example Input: Sentence: 'a four lane street in the suburbs'. Count the number of consonants in the given sentence.
Example Output:
16