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 young boy plays in a red ball pit. Sentence 2: A laughing boy lies on a pit of blue balls.

Ex Output:
3


Ex Input:
Sentence 1: Could be a lot of things. Sentence 2: Could be a simple mistake.

Ex Output:
2


Ex Input:
Sentence 1: A kid runs away from a fish swinging around on a fishing pole. Sentence 2: A little kid is running around a fishing pole.

Ex Output:

2