
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
In a math competition, there were only 20 multiple-choice questions. For each question answered correctly, 8 points were awarded, 5 points were deducted for each incorrect answer, and 0 points were given for unanswered questions. It is known that A's score in this exam was a multiple of 13. The number of questions A did not attempt in this exam is.

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