In this task, you need to count the number of words in a sentence that contain the given letter

Input: Consider Input: Sentence: 'a motorcycle parked in front of a small cafe'. How many words contain the letter 'n' in the sentence.

Output: 2


Input: Consider Input: Sentence: 'skate boarder trying to maintain his balance during stunt'. How many words contain the letter 'w' in the sentence.

Output: 0


Input: Consider Input: Sentence: 'a young boy on a skateboard in a courtyard'. How many words contain the letter 'w' in the sentence.


Output: 0