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 bird flying over the water in the ocean shore'. How many words contain the letter 'o' in the sentence.
Example Output: 3

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