
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
On the Moon, there are coins with denominations of 1, 15, and 50 fertings. Dunno made a purchase, paid with several coins, and received change - one more coin than he gave. What is the minimum possible price of the purchase?

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