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

Example Input: Sentence: 'a cellphone mounted to a dashboard of a car'. How many words contain the letter 'p' in the sentence.
Example Output: 1

Example Input: Sentence: 'a man in a helmet leans on his motorcycle'. How many words contain the letter 'n' in the sentence.
Example Output: 4

Example Input: Sentence: 'a number of fruits at a market'. How many words contain the letter 'd' in the sentence.
Example Output:
0