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

[EX Q]: Sentence: 'some people are sitting around a black table'. How many words contain the letter 'v' in the sentence.
[EX A]: 0

[EX Q]: Sentence: 'a person eating a slice of pizza on a table'. How many words contain the letter 'z' in the sentence.
[EX A]: 1

[EX Q]: Sentence: 'a man and a child are enjoying a couple of a donuts together'. How many words contain the letter 'r' in the sentence.
[EX A]:
2