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

Example Input: Sentence: 'a stop light that is out on a pole'. How many words contain the letter 'z' in the sentence.
Example Output: 0

Example Input: Sentence: 'a boy is doing a trick with his skateboard'. How many words contain the letter 'y' in the sentence.
Example Output: 1

Example Input: Sentence: 'two people sitting on a bench outside of a building'. How many words contain the letter 'y' in the sentence.
Example Output:
0