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.

Input: Consider Input: Sentence 1: Two brown dogs are biting each other. Sentence 2: Two brown dogs biting each other on sand.

Output: 4


Input: Consider Input: Sentence 1: A young child rides a horse. Sentence 2: The little girl rode a horse.

Output: 3


Input: Consider Input: Sentence 1: A close-up of a sheep in the grass. Sentence 2: A close-up of a lamb with its ear tagged, standing on grass.


Output: 2