
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
Given the following program, if the input is $m=546$, $n=210$, then the output is ____.  
```
INPUT "m, n="; m, n  
DO  
r = m MOD n  
m = n  
n = r  
LOOP UNTIL r = 0  
PRINT m  
END.
```

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