
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
A curator arranges a challenge for museum visitors to estimate the year a historical artifact was discovered. Visitors are told that the number representing the year is formed from the digits 1, 1, 1, 5, 8, and 9, and the year must begin with an odd digit.

How many different years can be suggested by the visitors?

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