
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
Jirka had three identical rectangles. First, he placed them next to each other as shown in the picture and obtained a rectangle with a perimeter of $20 \mathrm{~cm}$. He then arranged them differently and obtained a rectangle with a different perimeter. What was the perimeter of this rectangle? (In each arrangement, no two rectangles overlap and there are no gaps between them.)

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