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

Example Input: Sentence: 'a toilet sits in the middle of a street'. How many words contain the letter 'b' in the sentence.
Example Output: 0

Example Input: Sentence: 'a zebra is standing in the shallow water'. How many words contain the letter 't' in the sentence.
Example Output: 3

Example Input: Sentence: 'white pawed kitten sleeping on a white toaster'. How many words contain the letter 'w' in the sentence.
Example Output:
3