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: 'a green and white street sign on a pole and a light'. How many words contain the letter 's' in the sentence.

Answer: 2


Question: Sentence: 'a long train is coming down some tracks'. How many words contain the letter 'w' in the sentence.

Answer: 1


Question: Sentence: 'rectangular lunch type boxes contain some healthy food'. How many words contain the letter 'r' in the sentence.

Answer:
1