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

[EX Q]: Sentence: 'a large red sign on a metal pole'. How many words contain the letter 'q' in the sentence.
[EX A]: 0

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

[EX Q]: Sentence: 'cars backed up several blocks in traffic on a city street'. How many words contain the letter 'c' in the sentence.
[EX A]:
5