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 ram standing still in an empty pasture'. How many words contain the letter 'x' in the sentence.
[EX A]: 0

[EX Q]: Sentence: 'there are suitcases sitting next to each other with stickers on them'. How many words contain the letter 'b' in the sentence.
[EX A]:
0