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 small plane parked at an airfield with a cloudy sky overhead. Sentence 2: A small white plane parked in an airport on a cloudy day.

Output: 5


Input: Consider Input: Sentence 1: Italy soldiers die in Afghanistan Sentence 2: Two UK Soldiers Killed In Afghanistan

Output: 1


Input: Consider Input: Sentence 1: A boat is on the water near a small plane. Sentence 2: A boat is in the water and a small airplane is on the dock.


Output: 3