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 gray cat is wearing a santa hat'. How many words contain the letter 'm' in the sentence.
Example Output: 0

Example Input: Sentence: 'hundreds of sail boats docked in the water'. How many words contain the letter 'u' in the sentence.
Example Output:
1