
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
Points A and B move in a clockwise direction on the sides of a square with side length 100m. Point A starts from corner A of the square and moves at a speed of 5m/s, and Point B starts from the midpoint of side CD and moves at a speed of 10m/s. After how many seconds will they first be on the same side?

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