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: 'the bowl on the table is full of cut fruit'. How many words contain the letter 'b' in the sentence.
[EX A]: 2

[EX Q]: Sentence: 'a young man holding a tennis racquet while wearing a head band'. How many words contain the letter 's' in the sentence.
[EX A]:
1