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

Example Input: Sentence: 'a man with a surfboard walking across a bridge towards the ocean'. How many words contain the letter 'w' in the sentence.
Example Output: 3

Example Input: Sentence: 'a young skateboarder is performing tricks in a driveway'. How many words contain the letter 'd' in the sentence.
Example Output: 2

Example Input: Sentence: 'a cat with its face stuck down in a cup getting drink'. How many words contain the letter 'a' in the sentence.
Example Output:
4