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: Boy with glasses typing on a computer. Sentence 2: A boy looking at a computer screen.

Ex Output:
3


Ex Input:
Sentence 1: A man is running on the road. Sentence 2: A panda dog is running on the road.

Ex Output:
2


Ex Input:
Sentence 1: Thousands evacuated in Moscow metro fire Sentence 2: Thousands evacuated after fire breaks out in Moscow Metro

Ex Output:

5