
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 seven-digit phone number $d_{1} d_{2} d_{3}-d_{4} d_{5} d_{6} d_{7}$ is called "memorable" if the sequence $d_{1} d_{2} d_{3}$ is the same as either $d_{4} d_{5} d_{6}$ or $d_{5} d_{6} d_{7}$ (or all three are the same). If each $d_{i}$ can be one of the digits $0,1,2,3,\cdots,8,9$, calculate the number of different "memorable" phone numbers.

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