Teacher: 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.
Teacher: Now, understand the problem? If you are still confused, see the following example:
Premise: Old man crafting something in his workshop.
Hypothesis: An old man is working.
Update: The man is serious and is surrounded by workers.
Solution: strengthener
Reason: If the old man is serious and surrounded by workers, it is more likely that he is working.

Now, solve this instance: Premise: A little girl dips her hair into a bucket filled with water.
Hypothesis: The girl is trying to wash her hair.
Update: There are soap suds in the girls hair.
Student:
strengthener