
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
We created a rectangular thread grid consisting of squares. The number of knots along the two sides of the rectangle is $k$ and $n$, respectively. We tied a bead to each knot. For which number pairs $(k, n)$ is it possible to cut certain thread segments so that the beads are positioned on a single closed chain?

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