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: A close-up of a sheep with its tongue hanging out. Sentence 2: Close up image of a sheep with it's tongue hanging out.

Output: 5


Input: Consider Input: Sentence 1: Fallen US firefighters brought home Sentence 2: Wall Street ends slightly lower

Output: 0


Input: Consider Input: Sentence 1: A black dog is biting a light brown dogs ear in a playful manner. Sentence 2: A black dog playfully bits another dog in a living room setting


Output: 4