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

Example Input: Sentence: 'a large red sign on a metal pole'. How many words contain the letter 'q' in the sentence.
Example Output: 0

Example Input: Sentence: 'a couple are setting the different pizzas on a table'. How many words contain the letter 'c' in the sentence.
Example Output: 1

Example Input: Sentence: 'a gourmet pita sandwich including cheese and tomato'. How many words contain the letter 'g' in the sentence.
Example Output:
2