
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 certain intelligence station has four different passwords: A, B, C, and D, using one of them each week. Each week, one of the three unused passwords from the previous week is randomly selected for use. If password A is used in the first week, the probability that password A is also used in the seventh week is \_\_\_\_\_\_ . (Express the answer as a simplified fraction)

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