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

Input: Consider Input: Sentence: 'a man in a restaurant makes the v sign with both hands'. How many words contain the letter 'n' in the sentence.

Output: 5


Input: Consider Input: Sentence: 'a living room with couches chairs and tables'. How many words contain the letter 'a' in the sentence.

Output: 4


Input: Consider Input: Sentence: 'a determined looking tennis player holding her racquet'. How many words contain the letter 'k' in the sentence.


Output: 1