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

Example Input: Sentence: 'a pizza with sauce cheese and sausage sitting on a table'. How many words contain the letter 's' in the sentence.
Example Output: 4

Example Input: Sentence: 'a tabby cat under a white comforter and on top of a cream colored pillow'. How many words contain the letter 'l' in the sentence.
Example Output: 2

Example Input: Sentence: 'a box filled with cakes next to other boxes of cakes'. How many words contain the letter 'f' in the sentence.
Example Output:
2