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 traffic signs are pictured in front of a sky background'. Count the number of vowels in the given sentence.
Example Output: 16

Example Input: Sentence: 'a kitchen under construction with two large appliances'. Count the number of vowels in the given sentence.
Example Output: 17

Example Input: Sentence: 'a guy skate boarding in a skate park'. Count the number of vowels in the given sentence.
Example Output:
12