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

Example Input: Sentence: 'a cat is walking on a wooden deck in the snow'. How many words contain the letter 'q' in the sentence.
Example Output: 0

Example Input: Sentence: 'young girls with backpacks are standing near stairs that look to go to the subway'. How many words contain the letter 'r' in the sentence.
Example Output: 4

Example Input: Sentence: 'a kitty cat takes a nap on top of a comforter'. How many words contain the letter 'x' in the sentence.
Example Output:
0