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

Example Input: Sentence: 'a lighthouse with birds flying by it at a bay'. How many words contain the letter 'q' in the sentence.
Example Output: 0

Example Input: Sentence: 'a young girl plays tennis in a court with grass in the cracks'. How many words contain the letter 'w' in the sentence.
Example Output: 1

Example Input: Sentence: 'a crowd of people walking down a street'. How many words contain the letter 'u' in the sentence.
Example Output:
0