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

[Q]: Sentence: 'a cat is laying in a piece of luggage'. How many words contain the letter 'p' in the sentence.
[A]: 1


[Q]: Sentence: 'a long train is coming down some tracks'. How many words contain the letter 'w' in the sentence.
[A]: 1


[Q]: Sentence: 'the young man is practicing his tricks on the skateboard'. How many words contain the letter 'e' in the sentence.
[A]:
3