
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
Given points O(0, 0, 0), A(-2, 2, -2), B(1, 4, -6), and C(x, -8, 8), if OC is perpendicular to AB, then $x = \boxed{\text{\_\_\_\_\_}}$; if points O, A, B, and C are coplanar, then $x = \boxed{\text{\_\_\_\_\_}}$.

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