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

Example Input: Sentence: 'an asian man ad woman on their cell phones'. How many words contain the letter 'i' in the sentence.
Example Output: 2

Example Input: Sentence: 'a young man in a bunch of waves on his board'. How many words contain the letter 'j' in the sentence.
Example Output: 0

Example Input: Sentence: 'black and white photograph of a clock on a street'. How many words contain the letter 's' in the sentence.
Example Output:
1