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: 'several passengers waiting at the airport outside for luggage'. Count the number of consonants in the given sentence.
Example Output: 31

Example Input: Sentence: 'a picture of fresh grown apples on a tree while someone is holding one'. Count the number of vowels in the given sentence.
Example Output: 24

Example Input: Sentence: 'a man that is holding a falcon in his hand'. Count the number of vowels in the given sentence.
Example Output:
12