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

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: 'bus parked next to a side walk on the road'. How many words contain the letter 'd' in the sentence.
Example Output: 3

Example Input: Sentence: 'a bathroom with brown tile and a white scale on the floor'. How many words contain the letter 'g' in the sentence.
Example Output:
0