
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 rectangular paper has a length of 20 cm and a width of 15 cm. First, cut out the largest square possible, then from the remaining paper, cut out another largest square. Determine the length of the remaining rectangular piece of paper.

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