
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
Three households, A, B, and C, plan to subscribe to newspapers. There are 7 different newspapers available. Each household subscribes to exactly 3 different newspapers, and it is known that each pair of households subscribes to exactly one newspaper in common. How many different subscription methods are there for the three households in total?

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