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 baby is laughing and crawling. Sentence 2: A baby is laughing and crawling on the floor.

Output: 4


Input: Consider Input: Sentence 1: A dog is jumping up in the air to catch a toy. Sentence 2: A black dog jumps in the air to catch a toy.

Output: 4


Input: Consider Input: Sentence 1: Iran (Islamic Republic of): Iran steps up relief efforts after quakes kill 227 Sentence 2: Iran steps up relief efforts after quakes kill 227


Output: 5