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

Example Input: Sentence: 'a person in the air on skis on a mountain slope'. How many words contain the letter 'w' in the sentence.
Example Output: 0

Example Input: Sentence: 'a girl is ready to serve the ball on a clay court'. How many words contain the letter 'd' in the sentence.
Example Output: 1

Example Input: Sentence: 'a baseball player holding a bat standing next to home plate'. How many words contain the letter 'z' in the sentence.
Example Output:
0