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 white cat standing in a sink. Sentence 2: Grey and white cat sitting in bathroom sink.

Output: 4


Input: Consider Input: Sentence 1: tin foil hat for the dog face, what size do u wear? Sentence 2: tin foil hat for the sarg, what size do u wear?

Output: 3


Input: Consider Input: Sentence 1: Since being drafted into service in 1971, it has racked up a record 45 accidents, with 393 deaths. Sentence 2: It has a chequered safety record, including 47 accidents that resulted in 668 deaths.


Output: 1