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 open refrigerator filled with lots of food'. Count the number of consonants in the given sentence.
Example Output: 23

Example Input: Sentence: 'a fire hydrant is near a tree in a flooded area'. Count the number of consonants in the given sentence.
Example Output: 19

Example Input: Sentence: 'a zebra grazing on dirt during the daytime'. Count the number of vowels in the given sentence.
Example Output:
13