
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 the equation on the right, the letters \(a, b, c, d\) and the symbol \(\square\) represent the digits from 0 to 9. The four letters \(a, b, c, d\) represent different digits. Find the sum of the digits represented by \(a, b, c, d\).
\[
\begin{array}{r}
\text{a} 5 \text{b} \\
+\quad 4 \quad \text{c d} \\
\hline \square \square \square \\
-\quad \square \square \\
\hline
\end{array}
\]

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