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 and a woman sitting in the backseat as the woman talks on a cell phone'. How many words contain the letter 's' in the sentence.

Output: 4


Input: Consider Input: Sentence: 'three children standing behind a little girl with a bat in her hands'. How many words contain the letter 'c' in the sentence.

Output: 1


Input: Consider Input: Sentence: 'a large fluffy cat laying down on top of a bed'. How many words contain the letter 'w' in the sentence.


Output: 1