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

[EX Q]: Sentence: 'a couple of people that are on some skateboards'. How many words contain the letter 'o' in the sentence.
[EX A]: 6

[EX Q]: Sentence: 'a man holding a tennis racquet on a tennis court'. How many words contain the letter 'w' in the sentence.
[EX A]: 0

[EX Q]: Sentence: 'a man on a motorcycle towing another man on a skateboard'. How many words contain the letter 'n' in the sentence.
[EX A]:
6