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

Example Input: Sentence: 'a man in mid swing of a baseball bat'. How many words contain the letter 'k' in the sentence.
Example Output: 0

Example Input: Sentence: 'a teddy bear laying on a pillow on a bed'. How many words contain the letter 'w' in the sentence.
Example Output: 1

Example Input: Sentence: 'a white building an orange roof and a black clock'. How many words contain the letter 'd' in the sentence.
Example Output:
2