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: 'the cow is standing in the field all by himself'. Count the number of vowels in the given sentence.
Example Output: 12

Example Input: Sentence: 'two small dogs running in the water on a beach'. Count the number of vowels in the given sentence.
Example Output: 13

Example Input: Sentence: 'four men pose with their tennis racquets on the court'. Count the number of consonants in the given sentence.
Example Output:
27