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

Example Input: Sentence: 'a woman is laughing while sitting on a bed'. How many words contain the letter 'c' in the sentence.
Example Output: 0

Example Input: Sentence: 'a stop sign casting a shadow of a sign that says war'. How many words contain the letter 'y' in the sentence.
Example Output: 1

Example Input: Sentence: 'the boy is waiting for the plan to depart at the airport'. How many words contain the letter 'g' in the sentence.
Example Output:
1