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: Woman and young lady sit on the sidewalk while young man plays flute in background.
Hypothesis: The man is secretly a Russian spy watching the womens' every move.
Update: He surreptitiously snaps a photo.

Output: strengthener


Input: Consider Input: Premise: Two guys hold up a flag at a festival.
Hypothesis: Two guys that are brothers are at a festival.
Update: One of the guys is black and one of the guys is white.

Output: weakener


Input: Consider Input: Premise: A shirtless man, wearing a brown kilt and backpack, gives a thumbs up on a city sidewalk.
Hypothesis: A man is hitch hiking.
Update: The man needs a ride down the road.


Output: strengthener