
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
On the day of the "Double Ninth Festival", Yanling Tea House welcomed 25 elderly people for tea tasting. Their ages were exactly 25 consecutive natural numbers. Two years later, the sum of the ages of these 25 elderly people was exactly 2000. The age of the oldest person this year is $\boxed{90}$ years old.

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