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

Example Input: Sentence: 'a parked blue and white motorcycle with a black seat'. How many words contain the letter 'd' in the sentence.
Example Output: 2

Example Input: Sentence: 'a biscuit that someone has taken a bite out of'. How many words contain the letter 'k' in the sentence.
Example Output: 1

Example Input: Sentence: 'a bathroom with large brown tiles and white fixtures'. How many words contain the letter 'b' in the sentence.
Example Output:
2