
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 Laura added two three-digit positive integers, all six digits in these numbers are different, and the sum is a three-digit number $S$. Determine the smallest possible value for the sum of the digits of $S$.

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