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.

Input: Consider Input: Sentence: 'an old train next to some empty train tracks'. Count the number of vowels in the given sentence.

Output: 12


Input: Consider Input: Sentence: 'an image of a clock that is next to a group of books'. Count the number of consonants in the given sentence.

Output: 23


Input: Consider Input: Sentence: 'there are a lot of zebras that are on the yard'. Count the number of vowels in the given sentence.


Output: 15