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

[EX Q]: Sentence: 'a apple that is sitting on top of a knife'. How many words contain the letter 'u' in the sentence.
[EX A]: 0

[EX Q]: Sentence: 'a blue and white fire hydrant and two cars parked across the street'. How many words contain the letter 'y' in the sentence.
[EX A]: 1

[EX Q]: Sentence: 'a black bull with stuff on its nose in a stable'. How many words contain the letter 'k' in the sentence.
[EX A]:
1