
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 number line, four points are marked. Point $A$ corresponds to the number -3, point $B$ to the number -5, and point $C$ to the number 6. Find the fourth number that corresponds to point $K$ under the following condition: if the direction of the number line is reversed, the sum of the new numbers corresponding to the "old" points $A$, $B$, $C$, and $K$ remains unchanged.

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