In this task, you need to count the number of words in a sentence that contain the given letter
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Question: Sentence: 'the train needs to be serviced so it is o the truck'. How many words contain the letter 'n' in the sentence.

Answer: 2


Question: Sentence: 'trash cans and a fire hydrant are on the curb of a sidewalk'. How many words contain the letter 'u' in the sentence.

Answer: 1


Question: Sentence: 'two people on a subway car with one holding on'. How many words contain the letter 'p' in the sentence.

Answer:
1