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

Input: Consider Input: Sentence: 'a clothing line with teddy bears hung by their ears'. How many words contain the letter 'n' in the sentence.

Output: 3


Input: Consider Input: Sentence: 'some people are sitting around a black table'. How many words contain the letter 'v' in the sentence.

Output: 0


Input: Consider Input: Sentence: 'a frost covered hat sits on top of a bench'. How many words contain the letter 'u' in the sentence.


Output: 0