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

[Q]: Sentence: 'a cat that is laying down with a mouse on top of it'. How many words contain the letter 'm' in the sentence.
[A]: 1


[Q]: Sentence: 'a college student throws a frisbee in a field'. How many words contain the letter 't' in the sentence.
[A]: 2


[Q]: Sentence: 'an old luggage with a stuffed animal on top'. How many words contain the letter 'o' in the sentence.
[A]:
3