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

[EX Q]: Sentence: 'a large field is next to a river'. How many words contain the letter 'j' in the sentence.
[EX A]: 0

[EX Q]: Sentence: 'a sign that shows you are entering into joshua tree national park'. How many words contain the letter 't' in the sentence.
[EX A]: 5

[EX Q]: Sentence: 'three mass transit trains underneath an overpass at a train stop'. How many words contain the letter 'i' in the sentence.
[EX A]:
3