Find the second largest unique difference between any two numbers in an array.
Given an array of integers, find the second largest unique difference between any two numbers in it.
| # | Size | % | Users | 
|---|---|---|---|
| #1 | 64 c. |  Top 13%  | |
| #2 | 66 c. |  Top 25%  | |
| #3 | 67 c. |  Top 31%  | |
| #4 | 75 c. |  Top 50%  | |
| #5 | 77 c. |  Top 56%  | |
| #6 | 79 c. |  Top 63%  | |
| #7 | 80 c. |  Top 69%  | |
| #8 | 102 c. |  Top 75%  | |
| #9 | 116 c. |  Top 81%  | |
| #10 | 139 c. |  Top 88%  | |
| #11 | 459 c. |  Top 94%  | |
| #12 | 880 c. |  Top 100%  |