In this task, you're given a pair of sentences, sentence 1 and sentence 2. Your job is to choose whether the two sentences clearly agree (entailment)/disagree (contradiction) with each other, or if this cannot be determined (neutral). Your answer must be in the form of the letters E, C, and N respectively.

Q: Sentence 1: A man with black hair and gray pants is standing holding a helmet and looks very dirty. Sentence 2: A man is not clean

A: C
****
Q: Sentence 1: two dogs play in the water. Sentence 2: Animals are playing in water

A: C
****
Q: Sentence 1: Two men wearing wetsuits riding a wave on surfboards. Sentence 2: A man was giving another man surfing lessons.

A:
N
****