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 crowd of people at a festival type event in front of a clock tower'. Count the number of consonants in the given sentence.
Example Output: 33

Example Input: Sentence: 'elephant herd, in a line, walking across savanna'. Count the number of vowels in the given sentence.
Example Output: 15

Example Input: Sentence: 'a coach watches on as a pitcher pitches'. Count the number of vowels in the given sentence.
Example Output:
12