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 monkey pulls the tail of a dog. Sentence 2: A monkey is teasing a dog at the zoo.

Ex Output:
3


Ex Input:
Sentence 1: It's so stupid that it just has to be true. Sentence 2: It's amusing to think it even might be true.

Ex Output:
3


Ex Input:
Sentence 1: A girl swings her long, wet hair in a lake. Sentence 2: A person riding a dirt bike.

Ex Output:

0