
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
At the beginning of January 2020, Boris and Victor started saving money for a new phone. Every month, Boris saved 200 rubles and Victor saved 300 rubles. One day, Boris got tired of saving and stopped putting aside money (but he did not spend the money he had already saved). Victor continued to save. On May 11, 2021, Victor's savings became 6 times greater than Boris's savings. In which month did Boris stop saving? Indicate the month and year.

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