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

Example Input: Sentence: 'a man showing a piece of hardware he took apart'. How many words contain the letter 'y' in the sentence.
Example Output: 0

Example Input: Sentence: 'a airplane that has a propeller on the wing'. How many words contain the letter 'z' in the sentence.
Example Output: 0

Example Input: Sentence: 'and elephant eating grass at the zoo with other elephants behind him'. How many words contain the letter 's' in the sentence.
Example Output:
2