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 baseball player is in his hitting stance as a few people watch'. Count the number of consonants in the given sentence.
Example Output: 32

Example Input: Sentence: 'a woman on a green tennis court with a red and black tennis racket in her hand'. Count the number of consonants in the given sentence.
Example Output: 39

Example Input: Sentence: 'several lamb are depicted grazing in a grassy field'. Count the number of consonants in the given sentence.
Example Output:
27