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

[Q]: Sentence: 'a stop sign casting a shadow of a sign that says war'. How many words contain the letter 'y' in the sentence.
[A]: 1


[Q]: Sentence: 'a brown bear standing next to a giant rock'. How many words contain the letter 'j' in the sentence.
[A]: 0


[Q]: Sentence: 'a city street with lots of stone buildings on both sides'. How many words contain the letter 'e' in the sentence.
[A]:
3