
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
The sequence ${a_n}$ satisfies $a_{n+1}=a_{n}+a_{n-1}$ ($n \in \mathbb{N}^*, n \geqslant 2$), and $S_n$ is the sum of the first $n$ terms of the sequence. Given that $a_5=1$, find the value of $S_6$ = \_\_\_\_\_\_.

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