Evaluate the similarity between them and classify them into classes from 0-5 as follows:
0 : The two sentences are completely dissimilar.
1 : The two sentences are not equivalent, but are on the same topic.
2 : The two sentences are not equivalent, but share some details.
3 : The two sentences are roughly equivalent, but some important information differs/missing.
4 : The two sentences are mostly equivalent, but some unimportant details differ.
5 : The two sentences are completely equivalent, as they mean the same thing.

Input: Consider Input: Sentence 1: united states officials do not know how far north korea's nuclear weapons program has progressed. Sentence 2: hill is the head american negotiator on north korea's nuclear weapons program.

Output: 1


Input: Consider Input: Sentence 1: In 2006, the group says the market will rebound 29.6 percent to $21.3 billion in sales. Sentence 2: In 2006, Asia Pacific will report growth of 7.9 percent to $81.8 billion.

Output: 2


Input: Consider Input: Sentence 1: Five dead in Pakistan suicide blast Sentence 2: At least 63 dead in Pakistan factory blaze


Output: 1