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

[EX Q]: Sentence: 'a white cat sitting on a couch in a den'. How many words contain the letter 'l' in the sentence.
[EX A]: 0

[EX Q]: Sentence: 'a airplane is seen at the airport with other airplanes'. How many words contain the letter 'z' in the sentence.
[EX A]: 0

[EX Q]: Sentence: 'a black cat laying on the floor looking up'. How many words contain the letter 'w' in the sentence.
[EX A]:
0