
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
To excavate a 300-meter-long tunnel, two construction teams, Team A and Team B, start working simultaneously from both ends of the tunnel. On the first day, Teams A and B each advance 10 meters. From the second day onwards, Team A's daily efficiency always doubles that of the previous day, while Team B's daily efficiency always increases by 1.5 times from the previous day. How many days will it take to complete the tunnel?

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