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

[Q]: Sentence: 'a group of people holding kites walking on a beach'. How many words contain the letter 'x' in the sentence.
[A]: 0


[Q]: Sentence: 'a small terrier stands in the open suitcase ready to go'. How many words contain the letter 'l' in the sentence.
[A]: 1


[Q]: Sentence: 'this boy is riding his skateboard on a sidewalk'. How many words contain the letter 'w' in the sentence.
[A]:
1