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: A large black bird is sitting in the water. Sentence 2: The birds are swimming in the water.

Output: 3


Input: Consider Input: Sentence 1: That exploit works on unpatched Windows 2000 machines with Service Pack 3 and 4. Sentence 2: Both Counterpane and iDefense contend that the exploit works effectively against Windows 2000 systems running Service Pack 3 and 4.

Output: 3


Input: Consider Input: Sentence 1: Smugglers in a van chased down a pickup and SUV carrying other smugglers and illegal immigrants, said Pinal County Sheriff Roger Vanderpool. Sentence 2: People in a van opened fire on a pickup and SUV believed to be transporting illegal immigrants, said Pinal County Sheriff Roger Vanderpool.


Output: 3