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

Example Input: Sentence: 'a surfer in a black wet suit riding a wave in the ocean'. How many words contain the letter 'x' in the sentence.
Example Output: 0

Example Input: Sentence: 'a boy is doing a trick with his skateboard'. How many words contain the letter 'y' in the sentence.
Example Output: 1

Example Input: Sentence: 'multiple people are surfing in shallow waves'. How many words contain the letter 'f' in the sentence.
Example Output:
1