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 team meets at the pitcher's mound to talk'. Count the number of consonants in the given sentence.
Example Output: 26

Example Input: Sentence: 'a tourist attraction of a clock tower with a flag flying'. Count the number of vowels in the given sentence.
Example Output: 17

Example Input: Sentence: 'a bird is perched by the side of a river'. Count the number of consonants in the given sentence.
Example Output:
19