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 view of living room with brown sofas, with the kitchen in the background'. Count the number of vowels in the given sentence.
Example Output: 21

Example Input: Sentence: 'a giraffe wanders through the plains, searching for a tall tree to graze on'. Count the number of consonants in the given sentence.
Example Output: 38

Example Input: Sentence: 'a baseball player on a pitchers mound on a field'. Count the number of consonants in the given sentence.
Example Output:
23