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 smiling young man sits in a chair with ties on his shoulder'. Count the number of vowels in the given sentence.
Example Output: 19

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 large bear sits in a green lawn chair'. Count the number of consonants in the given sentence.
Example Output:
18