
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
The grain store has 6 bags of flour, weighing 15 kg, 16 kg, 18 kg, 19 kg, 20 kg, and 31 kg respectively. The cafeteria bought 5 of these bags in two purchases. It is known that the weight of the first purchase is twice that of the second purchase. What is the weight of the remaining bag?

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