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 person that is flying a hamburger kite'. How many words contain the letter 'b' in the sentence.
Example Output: 1

Example Input: Sentence: 'a man sitting on the bottom bunk in a small room with other people'. How many words contain the letter 'k' in the sentence.
Example Output:
1