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

Example Input: Sentence: 'a little girl sitting on the floor reading a book'. How many words contain the letter 'n' in the sentence.
Example Output: 3

Example Input: Sentence: 'a photograph of a restroom toilet in front of tiles'. How many words contain the letter 'c' in the sentence.
Example Output: 0

Example Input: Sentence: 'a box of donuts and a cup of coffee'. How many words contain the letter 'j' in the sentence.
Example Output:
0