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

Example Input: Sentence: 'a blue motorcycle parked next to a tree in a forest'. How many words contain the letter 'm' in the sentence.
Example Output: 1

Example Input: Sentence: 'a horse that has a car behind it in the street'. How many words contain the letter 'j' in the sentence.
Example Output: 0

Example Input: Sentence: 'a pretty young lady carrying two large donuts in a restaurant'. How many words contain the letter 'o' in the sentence.
Example Output:
3