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

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


[Q]: Sentence: 'a man that is sitting on a horse in the grass'. How many words contain the letter 'y' in the sentence.
[A]: 0


[Q]: Sentence: 'a man sitting at a desk looking at an open laptop'. How many words contain the letter 'e' in the sentence.
[A]:
2