
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
Sristan Thin is walking around the Cartesian plane. From any point  $\left(x,y\right)$ , Sristan can move to  $\left(x+1,y\right)$  or  $\left(x+1,y+3\right)$ . How many paths can Sristan take from  $\left(0,0\right)$  to  $\left(9,9\right)$ ?

*2019 CCA Math Bonanza Individual Round #3*

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