
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
Given an ellipse C: $$\frac {x^{2}}{a^{2}}+ \frac {y^{2}}{b^{2}}=1$$ (where $a>b>0$) with an eccentricity of $$\frac {3}{5}$$, and the length of its minor axis is 8.  
(1) Find the standard equation of ellipse C;  
(2) Let $F_1$ and $F_2$ be the left and right foci of ellipse C, respectively. A line $l$ passing through $F_2$ intersects ellipse C at two distinct points M and N. If the circumference of the inscribed circle of $\triangle F_1MN$ is $\pi$, and $M(x_1, y_1)$, $N(x_2, y_2)$, find the value of $|y_1 - y_2|$.

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