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: china is north korea's closest ally. Sentence 2: north korea is a reclusive state.

Output: 1


Input: Consider Input: Sentence 1: A girl is playing a flute. Sentence 2: A band is playing on a stage.

Output: 1


Input: Consider Input: Sentence 1: the united states government and other nato members have refused to ratify the amended treaty until officials in moscow withdraw troops from the former soviet republics of moldova and georgia. Sentence 2: the united states and other nato members have refused ratify the amended treaty until russia completely withdraws from moldova and georgia.


Output: 5