
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
The diagram shows part of a river which has two islands in it. There are six bridges linking the islands and the two banks as shown. Leonhard goes for a walk every day in which he walks over each bridge exactly once. He always starts at point \( A \), goes first over bridge 1 and always finishes at point \( B \). What is the maximum number of days that he can walk without repeating the order in which he crosses the bridges?

A 2  
B 4  
C 5  
D 6  
E More than 6

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