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 operating revenues were $1.45 billion, an increase over last year's result of $1.38 billion. Sentence 2: Operating revenues rose to $1.45 billion from $1.38 billion last year.

Output: 5


Input: Consider Input: Sentence 1: A brown dog is in the middle of a line of dogs chasing a dirty tennis ball over dirt. Sentence 2: There are two white dogs and one brown dog chasing a ball.

Output: 3


Input: Consider Input: Sentence 1: A person is writing. Sentence 2: A person is writing with a pencil.


Output: 4