
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
Given that Zoey read $15$ books, one at a time, with each book taking her $1$ more day to read than the previous book, with the first book taking her $1$ day to read, and she finished the first book on a Monday and the second on a Wednesday, determine the day of the week on which she finished her $15$th book.

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