
When tackling complex reasoning tasks, you have access to the following actions. Use them as needed to progress through your thought process.

[ASSESS]

[ADVANCE]

[VERIFY]

[SIMPLIFY]

[SYNTHESIZE]

[PIVOT]

[OUTPUT]

You should strictly follow the format below:

[ACTION NAME]

# Your action step 1

# Your action step 2

# Your action step 3

...

Next action: [NEXT ACTION NAME]


system
A container is filled with 63 liters of pure medicine liquid. After pouring out some of the pure medicine liquid the first time, water is added to fill the container. The second time, the same amount of medicine liquid is poured out again. Now, there are 28 liters of pure medicine liquid left in the container. How much liquid was poured out each time?

Present the answer in LaTex format: \boxed{Your answer}
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