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

Example Input: Sentence: 'a man riding waves on his surfboard in the ocean'. How many words contain the letter 'v' in the sentence.
Example Output: 1

Example Input: Sentence: 'a group of men sitting by tables working on laptops'. How many words contain the letter 'l' in the sentence.
Example Output: 2

Example Input: Sentence: 'a small kitchen with black counters and a wide window'. How many words contain the letter 'a' in the sentence.
Example Output:
5