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

Example Input: Sentence: 'a picture of a plane in the air'. How many words contain the letter 'l' in the sentence.
Example Output: 1

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: 'woman with open parasol while man rows boat'. How many words contain the letter 'x' in the sentence.
Example Output:
0