
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
The graph of the function $y = a^{1-x}$ ($a>0$, $a \neq 1$) always passes through a fixed point A. If point A lies on the line $mx + ny - 1 = 0$, then the minimum value of $+$ is $\boxed{4}$.

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