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

[EX Q]: Sentence: 'a pizza pie is on a wooden serving tray'. How many words contain the letter 's' in the sentence.
[EX A]: 2

[EX Q]: Sentence: 'a dog jumping up and catching a frisbee in its mouth'. How many words contain the letter 'r' in the sentence.
[EX A]: 1

[EX Q]: Sentence: 'some kind of stand that is holding up bags'. How many words contain the letter 'r' in the sentence.
[EX A]:
0