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: The broader Standard & Poor's 500 Index .SPX rose 3.47 points, or 0.36 percent, to 977.59. Sentence 2: The tech-laden Nasdaq Composite Index .IXIC shed 8 points, or 0.45 percent, to 1,645.

Output: 1


Input: Consider Input: Sentence 1: A dog is jumping over a barrier at a agility competition. Sentence 2: A dog jumping over an obstacle course fence.

Output: 4


Input: Consider Input: Sentence 1: russia ratified the amended version of the treaty. Sentence 2: russia ratified the amended treaty.


Output: 5