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: 'cows crowd up to a barbed wire fence under a tree'. How many words contain the letter 'n' in the sentence.

Answer: 2


Question: Sentence: 'a large elephant is walking by some bars'. How many words contain the letter 'v' in the sentence.

Answer: 0


Question: Sentence: 'a tennis player jumping to hit a ball'. How many words contain the letter 'a' in the sentence.

Answer:
4