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

[EX Q]: Sentence: 'a close up of a business sign on a building'. How many words contain the letter 'y' in the sentence.
[EX A]: 0

[EX Q]: Sentence: 'three birds perched on top of a wire fence'. How many words contain the letter 'b' in the sentence.
[EX A]: 1

[EX Q]: Sentence: 'a man standing next to a horse being ridden by a young boy'. How many words contain the letter 'b' in the sentence.
[EX A]:
3