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: ALTHOUGH SATELLITE INTENSITY ESTIMATES FROM TAFB AND SAB ARE ONLY T./ Sentence 2: SUBJECTIVE DVORAK INTENSITY ESTIMATES FROM TAFB AND SAB INCREASED TO  KT.

Ex Output:
2


Ex Input:
Sentence 1: A group of penguins is walking. Sentence 2: A large amount of penguins are heading to the ocean.

Ex Output:
3


Ex Input:
Sentence 1: united states officials do not know how far north korea's nuclear weapons program has progressed. Sentence 2: hill is the head american negotiator on north korea's nuclear weapons program.

Ex Output:

1