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 toilet sits in the middle of a street'. How many words contain the letter 'b' in the sentence.
[EX A]: 0

[EX Q]: Sentence: 'two cows standing behind a fence with a sign next to it'. How many words contain the letter 'x' in the sentence.
[EX A]:
1