
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 diagram, $O$ is the center of a circle with radii $OR = OS = 7$. What is the perimeter of the shaded region?

[asy]
size(100);
import graph;
label("$R$",(-1,0),W); label("$O$",(0,0),NE); label("$S$",(0,-1),S);

fill(Arc((0,0),1,-90,225)--cycle,mediumgray);
draw(Arc((0,0),1,-90,225));
fill((0,0)--(-1,0)--(0,-1)--cycle,white);
draw((-1,0)--(0,0)--(0,-1));
draw((-.1,0)--(-.1,-.1)--(0,-.1));
[/asy]

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