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: 'an individual poses for a picture beside a bright window'. How many words contain the letter 'y' in the sentence.

Output: 0


Input: Consider Input: Sentence: 'a grey  fighter jet parked at an airport'. How many words contain the letter 'v' in the sentence.


Output: 0