
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
Organize a batch of books. If done by one person alone, it would take 60 hours. Initially, a group of people worked for one hour, and then 15 more people joined them, and together they worked for another two hours, just completing the task. Assuming each person works at the same rate, how many people were initially arranged to do the sorting?

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