
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
On a circuit board, the chips $P, Q, R, S$ are connected by wires in all possible ways. For economic reasons, the $Q S$ wire runs underneath, while the others are on top. An electron starts wandering from $P$ in such a way that at each chip, it chooses one of the possible 3 directions with equal probability. What is the probability that the electron reaches the underside of the circuit board for the first time on the 1995th step?

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