
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 first term of the sequence ${a_n}$ is $a_1=2$, and $a_{n+1}=3a_{n}+2 (n∈N^{*})$. Let $b_n=\log_{3}(a_n+1)$, then the sum of the first 2019 terms of the sequence $\{ \frac {1}{b_{2n-1}b_{2n+1}}\}$ is $S_{2019}=\_\_\_\_\_\_.$

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