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

Example Input: Sentence: 'black and white photograph of a man using a cell phone on the street'. How many words contain the letter 'r' in the sentence.
Example Output: 2

Example Input: Sentence: 'a baseball player in the middle of a swing'. How many words contain the letter 'p' in the sentence.
Example Output: 1

Example Input: Sentence: 'a person holds a sprinkle covered doughnut to a cats face'. How many words contain the letter 'p' in the sentence.
Example Output:
2