
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
Bully Dima constructed a rectangle from 38 wooden toothpicks in the shape of a $3 \times 5$ grid. Then he simultaneously ignited two adjacent corners of the rectangle, as marked on the diagram.

It is known that one toothpick burns in 10 seconds. How many seconds will it take for the entire structure to burn?

(The fire spreads along the toothpicks at a constant speed. The fire continues to spread from each burned toothpick to all adjacent unburned toothpicks.)

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