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

Example Input: Sentence: 'a dog lying down with a blanket on top of it'. How many words contain the letter 'o' in the sentence.
Example Output: 5

Example Input: Sentence: 'a bed has an empty bag and folded laundry stacked on it'. How many words contain the letter 'm' in the sentence.
Example Output: 1

Example Input: Sentence: 'man and his dog laying on the floor inside of a room'. How many words contain the letter 'p' in the sentence.
Example Output:
0