
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
Assume that a certain BASIC language limits identifiers to a maximum of three characters. The first character must be one of the 26 English letters, and the 2nd and 3rd characters can be either English letters or Arabic numerals (0, 1, 2, 3, 4, ..., 9). Find the total number of possible identifiers. Identifiers can be composed of one, two, or at most three characters.

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