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

Example Input: Sentence: 'an individual poses for a picture beside a bright window'. How many words contain the letter 'y' in the sentence.
Example Output: 0

Example Input: Sentence: 'a large elephant is walking by some bars'. How many words contain the letter 'v' in the sentence.
Example Output: 0

Example Input: Sentence: 'a street with a sidewalk next to it theres also a wall'. How many words contain the letter 'a' in the sentence.
Example Output:
6