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

Input: Consider Input: Sentence: 'people are parked along side the road by pay here signs'. How many words contain the letter 'a' in the sentence.

Output: 5

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 very large kitchen with lots of sinks and a microwave'. How many words contain the letter 'v' in the sentence.
Output: 2