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

[EX Q]: Sentence: 'a girl at a lake is looking at sand inside of a frisbee'. How many words contain the letter 'u' in the sentence.
[EX A]: 0

[EX Q]: Sentence: 'a group of bears sitting next to each other on a sidewalk'. How many words contain the letter 't' in the sentence.
[EX A]: 4

[EX Q]: Sentence: 'a home computer and laptop on a desk'. How many words contain the letter 'k' in the sentence.
[EX A]:
1