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.

Ex Input:
Sentence 1: Fighting continued until midnight, western rebel commander Ousmane Coulibaly told Reuters by satellite phone on Sunday. Sentence 2: They ransacked and burned the two villages completely, rebel commander Ousmane Coulibaly told Reuters by satellite phone from the bush.

Ex Output:
3


Ex Input:
Sentence 1: The dog is barking at the toy. Sentence 2: A dog is barking at a toy.

Ex Output:
5


Ex Input:
Sentence 1: A dog jumps over a chain. Sentence 2: A dog leaping over a chain.

Ex Output:

5