
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 treasure chest has a lock with a four-digit combination. Each digit is represented by a letter, and an embedded message reads: "LAKE KALE LEAK: KLAE." A note alongside suggests that it's an encrypted message and that the digits should be considered in base different from the decimal. Using base 9, deduce the four-digit combination (represented by the number "LEKA") needed to open the chest.

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