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

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: 'ancient pottery being displayed on an exhibit case'. How many words contain the letter 's' in the sentence.
Example Output: 2

Example Input: Sentence: 'a woman standing on a snowy hill holding onto her skiis and poles'. How many words contain the letter 'x' in the sentence.
Example Output:
0