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

[EX Q]: Sentence: 'street signs are affixed to a utility pole'. How many words contain the letter 'u' in the sentence.
[EX A]: 1

[EX Q]: Sentence: 'a man on a boat pets a dog in a life jacket'. How many words contain the letter 'b' in the sentence.
[EX A]: 1

[EX Q]: Sentence: 'an electric parking sign on the side of the road'. How many words contain the letter 'z' in the sentence.
[EX A]:
0