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

Example Input: Sentence: 'a young man attempting to fly a kite on a forest hillside'. How many words contain the letter 'f' in the sentence.
Example Output: 2

Example Input: Sentence: 'looking out a window at a tall building with a clock on the face'. How many words contain the letter 'l' in the sentence.
Example Output: 4

Example Input: Sentence: 'a man works on his laptop at a restaurant'. How many words contain the letter 'b' in the sentence.
Example Output:
0