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

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

[EX Q]: Sentence: 'a man driving with his dog in the back seat'. How many words contain the letter 't' in the sentence.
[EX A]: 3

[EX Q]: Sentence: 'a military airplane is flying low in the sky'. How many words contain the letter 'a' in the sentence.
[EX A]:
3