
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
What is the result of executing the following program? S = _______.
```
i = 1
S = 0
WHILE i <= 50
  S = S + i
  i = i + 1
WEND
PRINT S
END
```

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