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

Example Input: Sentence: 'a person is riding a bicycle on the street'. How many words contain the letter 'b' in the sentence.
Example Output: 1

Example Input: Sentence: 'a surfer in a black wet suit riding a wave in the ocean'. How many words contain the letter 'x' in the sentence.
Example Output: 0

Example Input: Sentence: 'a young girl plays tennis in a court with grass in the cracks'. How many words contain the letter 'w' in the sentence.
Example Output:
1