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

[EX Q]: Sentence: 'trash cans and a fire hydrant are on the curb of a sidewalk'. How many words contain the letter 'u' in the sentence.
[EX A]: 1

[EX Q]: Sentence: 'a carrot and celery are on a cutting board'. How many words contain the letter 's' in the sentence.
[EX A]: 0

[EX Q]: Sentence: 'the tech web page shows the screen of a pda'. How many words contain the letter 'u' in the sentence.
[EX A]:
0