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 scene in a baseball game'. How many words contain the letter 'g' in the sentence.
Example Output: 1

Example Input: Sentence: 'a man riding a snowboard down the side of a snow covered slope'. How many words contain the letter 'c' in the sentence.
Example Output: 1

Example Input: Sentence: 'an empty wooden bench next to a long row of yellow flowers'. How many words contain the letter 'w' in the sentence.
Example Output:
4