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

Example Input: Sentence: 'sitting room with couch and entertainment system in cabinets'. How many words contain the letter 'e' in the sentence.
Example Output: 3

Example Input: Sentence: 'a plastic container filled with pastry balls sitting on a counter'. How many words contain the letter 'q' in the sentence.
Example Output: 0

Example Input: Sentence: 'a assortment of donuts sitting on a plate'. How many words contain the letter 'r' in the sentence.
Example Output:
1