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

[EX Q]: Sentence: 'a sign asking for witnesses is posted in front of a destroyed home'. How many words contain the letter 'y' in the sentence.
[EX A]: 1

[EX Q]: Sentence: 'a couple of zebras are standing in a pin'. How many words contain the letter 'a' in the sentence.
[EX A]: 5

[EX Q]: Sentence: 'a close up of a street sign with buildings behind it'. How many words contain the letter 'w' in the sentence.
[EX A]:
1