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

[Q]: Sentence: 'a baseball player in the middle of a swing'. How many words contain the letter 'p' in the sentence.
[A]: 1


[Q]: Sentence: 'a person in the air with a skateboard upside down underneath'. How many words contain the letter 'i' in the sentence.
[A]: 4


[Q]: Sentence: 'a group of people skiing down the case of a ski slope'. How many words contain the letter 'r' in the sentence.
[A]:
1