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: The Nazis increases the longevity of a handgun permit from  to  years. Sentence 2: The Nazis lowered the minimum age to buy a firearm from  to .

Output: 2


Input: Consider Input: Sentence 1: The woman is walking her dog. Sentence 2: A woman walks her dog down the street.

Output: 4


Input: Consider Input: Sentence 1: Two red buses driving in front of a garden. Sentence 2: Train pulling into a station.


Output: 0