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 young boy in a white dress shirt is playing on a grassy plain. Sentence 2: A woman is getting her hair done at a salon.

Output: 0


Input: Consider Input: Sentence 1: chinese authorities were not immediately available for comment. Sentence 2: godzhayev and godzhayev's lawyers were not immediately available to comment.

Output: 1


Input: Consider Input: Sentence 1: russia is a member of the quartet on the middle east. Sentence 2: russia is a member of the nsg.


Output: 2