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

[EX Q]: Sentence: 'a couple of horses standing next to each other on a field'. How many words contain the letter 'q' in the sentence.
[EX A]: 0

[EX Q]: Sentence: 'a dog lying down with a blanket on top of it'. How many words contain the letter 'o' in the sentence.
[EX A]: 5

[EX Q]: Sentence: 'a view from inside a train cart going down a track'. How many words contain the letter 'e' in the sentence.
[EX A]:
2