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

Example Input: Sentence: 'a man is water skiing in the ocean'. How many words contain the letter 'c' in the sentence.
Example Output: 1

Example Input: Sentence: 'a cat sitting on the arm of a chair'. How many words contain the letter 'g' in the sentence.
Example Output: 1

Example Input: Sentence: 'a group of people are gathering and looking at cell phones'. How many words contain the letter 'h' in the sentence.
Example Output:
2