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: 'there is a broken toilet in the street'. Count the number of vowels in the given sentence.
Example Output: 13

Example Input: Sentence: 'several double-decker buses parked in an indoor lot'. Count the number of consonants in the given sentence.
Example Output: 25

Example Input: Sentence: 'a boy holding up a bat on a street at night'. Count the number of vowels in the given sentence.
Example Output:
13