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: X'mas cruise passengers hit by Norovirus Sentence 2: Missing cruise passenger is a NSW ambo

Output: 0


Input: Consider Input: Sentence 1: General Myers told reporters that "at first blush, it doesn't look like any rules were broken". Sentence 2: At first blush, it doesn't look like any rules were broken, said Gen. Richard Myers, chairman of the Joint Chiefs of Staff.

Output: 4


Input: Consider Input: Sentence 1: The pill, which they call the "polypill," would contain aspirin, a cholesterol-lowering drug, three blood pressure-lowering drugs at half the standard dose and folic acid. Sentence 2: The ingredients of such a polypill would contain aspirin, a cholesterol-lowering statin, three blood pressure-lowering agents in half dose, and folic acid.


Output: 5