
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
You are given a program below to calculate the average of $20$ numbers. Determine the appropriate statement to fill in the blank line.

\(\boxed{ \begin{matrix}S=0 \\ i=1 \\ DO \\ \quad INPUT\quad x \\ \quad S=S+x \\ \quad i=i+1 \\ LOOP\quad UNTIL\quad \_\_\_\_\_\_\_\_ \\ a=S/20 \\ PRINT\quad a \\ END \end{matrix}}\)

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