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: 'this is a yellow train riding the rails'. How many words contain the letter 'n' in the sentence.

Answer: 2


Question: Sentence: 'a bus station full of people walking on the side walk'. How many words contain the letter 'q' in the sentence.

Answer: 0


Question: Sentence: 'a black bear sits on a stump behind black barbed wire'. How many words contain the letter 'p' in the sentence.

Answer:
1