In this task, you are given a premise, a hypothesis, and an update. The premise sentence describes a real-world situation and is always assumed to be true. The hypothesis sentence describes an assumption or inference that you might make about that situation having read the premise. The update provides additional information about the situation that might weaken or strengthen the hypothesis. A weakener is a statement that weakens the hypothesis, that is, it makes you much less likely to believe the hypothesis is true. A strengthener is a statement that strengthens the hypothesis, that is, it makes you much more likely to believe the hypothesis is true. Your task is to answer with 'strengthener' or 'weakener' if the update strengthens or weakens the hypothesis, respectively.

Input: Consider Input: Premise: A biker is racing downhill.
Hypothesis: driving competetion is going on
Update: Police officers on bikes are chasing the person

Output: weakener


Input: Consider Input: Premise: A group of volunteers help build a house on behalf of Habitat for Humanity.
Hypothesis: Tall beings building
Update: The group of volunteers are average height.

Output: weakener


Input: Consider Input: Premise: A teenage boy performs a stunt on his skateboard in a skate park.
Hypothesis: The teenager is performing his best skateboard stunt.
Update: The skateboarder has been practicing this move for 2 years now.


Output: strengthener