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

Example Input: Sentence: 'a bus station full of people walking on the side walk'. How many words contain the letter 'q' in the sentence.
Example Output: 0

Example Input: Sentence: 'a tabby cat under a white comforter and on top of a cream colored pillow'. How many words contain the letter 'l' in the sentence.
Example Output: 2

Example Input: Sentence: 'a surfer rides a wave with his surfboard lifted into the air'. How many words contain the letter 'd' in the sentence.
Example Output:
3