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

Example Input: Sentence: 'a airplane is seen at the airport with other airplanes'. How many words contain the letter 'z' in the sentence.
Example Output: 0

Example Input: Sentence: 'a sandwich shop with cars parked in front of it'. How many words contain the letter 'u' in the sentence.
Example Output: 0

Example Input: Sentence: 'a man riding a skateboard in a building'. How many words contain the letter 'a' in the sentence.
Example Output:
5