
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
Murtha continues her pebble collection into the next week. She collects pebbles in the same increasing manner for 20 days. How many pebbles will she have collected by the end of the twentieth day?

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