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: A dog shaking off water. Sentence 2: A dog shaking water off.

Ex Output:
5


Ex Input:
Sentence 1: Nokia apologises for 'faked' ad Sentence 2: US waives riders for Pak aid

Ex Output:
0


Ex Input:
Sentence 1: A black dog is running in snow. Sentence 2: A black dog is swimming with a ball in it's mouth.

Ex Output:

2