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: 'a man standing on a surf board, holding an oar'. Count the number of consonants in the given sentence.
Example Output: 22

Example Input: Sentence: 'zebras made of legos in field with plants and trees'. Count the number of consonants in the given sentence.
Example Output: 27

Example Input: Sentence: 'a giraffe standing near to two deer in a semi-arid grassland'. Count the number of vowels in the given sentence.
Example Output:
20