You will be given a definition of a task first, then some input of the task.
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.

Sentence: 'two guys in a living room playing a nintendo wii'. Count the number of consonants in the given sentence.
Output:
23