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: 'two balls of yard and needles on a table'. Count the number of vowels in the given sentence.
Example Output: 12

Example Input: Sentence: 'a woman sitting at a table in a restaurant'. Count the number of consonants in the given sentence.
Example Output: 19

Example Input: Sentence: 'people are skiing on the fresh snow on the slope'. Count the number of vowels in the given sentence.
Example Output:
15