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

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: 'two males and a drink a laptop and a cellphone'. How many words contain the letter 'b' in the sentence.
Example Output: 0

Example Input: Sentence: 'a german shepherd dog laying down and relaxing'. How many words contain the letter 'o' in the sentence.
Example Output:
2