
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
As shown in the left diagram, person A needs to move from point \( A \) to point \( B \) and can only move one step up or one step to the right each time. Person B needs to move from point \( C \) to point \( D \), and can also only move one step up or one step to the right each time. If their paths do not intersect (share no common points), then they are said to take a "Central Ring Road" (the right diagram is an example of such a "Central Ring Road"). How many "Central Ring Roads" are there in total?

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