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.

Ex Input:
Sentence 1: A man is hugging someone. Sentence 2: A man is taking a picture.

Ex Output:
0


Ex Input:
Sentence 1: Bush plans to meet with Israeli Prime Minister Ariel Sharon and the new Palestinian prime minister, Mahmoud Abbas, in the Jordanian port of Aqaba on Wednesday. Sentence 2: On Wednesday next week, Mr Bush will meet Israeli Prime Minister Ariel Sharon and new Palestinian leader Mahmoud Abbas in Aqaba, Jordan.

Ex Output:
5


Ex Input:
Sentence 1: A green steam engine traveling on the railroad tracks. Sentence 2: A black steam train traveling on the railroad tracks.

Ex Output:

3