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

Example Input: Sentence: 'a close up of a business sign on a building'. How many words contain the letter 'y' in the sentence.
Example Output: 0

Example Input: Sentence: 'a bed has an empty bag and folded laundry stacked on it'. How many words contain the letter 'm' in the sentence.
Example Output: 1

Example Input: Sentence: 'a person surfing down a river on a surf board'. How many words contain the letter 'p' in the sentence.
Example Output:
1