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

Example Input: Sentence: 'a woman is standing at a fruit stand'. How many words contain the letter 'y' in the sentence.
Example Output: 0

Example Input: Sentence: 'a person that is fixing a pillow on a couch'. How many words contain the letter 's' in the sentence.
Example Output: 2

Example Input: Sentence: 'a young boy with a video game controller in his hand'. How many words contain the letter 'r' in the sentence.
Example Output:
1