
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
Xiaolan adds consecutive even numbers \(2, 4, 6, 8, 10, 12, 14, 16, \dots\) and obtains the result 2012. Upon verification, it is found that one number was omitted. What is the missing number? _______ .

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