Definition: In this task, you're given a statement, and three sentences as choices. Your job is to determine which sentence clearly disagrees with the statement. Indicate your answer as '1', '2', or '3' corresponding to the choice number of the selected sentence.
Input: Statement: inside their mouths. Choices:  1. On the inside of the mouth. 2. On the outside of their mouth. 3. Inside the dogs mouth

2