
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
Walter earns $4$ dollars for doing his daily chores normally, and $6$ dollars for doing them exceptionally well. After $15$ days, Walter has accumulated a total of $70$ dollars from doing his chores. If Walter did his chores exceptionally well on at least 5 days, determine the number of days on which he performed exceptionally well.

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