
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
Vasya added four numbers pairwise. The four largest of the six resulting sums were 20, 16, 13, and 9. Find the two remaining sums and determine which numbers Vasya could have added.

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