
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
Nine identical books cost 11 rubles and some kopecks, and thirteen identical books cost 15 rubles and some kopecks. Determine the exact cost of one book.

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