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: 'an umbrella is displayed along with several other personal items'. Count the number of consonants in the given sentence.
Example Output: 34

Example Input: Sentence: 'two cats sitting with a woman near a window'. Count the number of vowels in the given sentence.
Example Output: 13

Example Input: Sentence: 'the three people are standing on the same side of the tennis net'. Count the number of vowels in the given sentence.
Example Output:
21