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 group of people standing around a tv'. Count the number of vowels in the given sentence.
Example Output: 13

Example Input: Sentence: 'a truck dumping soil in a rural area'. Count the number of vowels in the given sentence.
Example Output: 13

Example Input: Sentence: 'a bar with a very large clock overhead'. Count the number of vowels in the given sentence.
Example Output:
12