Reverse
Let's play a game ...
Run 3
Input
4 6 18 3 16 14 11 7 5 9 15 19 8 12 1 20 17 2 13 10
Possible Output
Remember, for this challenge, there might be more than one valid output.
16 20 16 19 10 18 15 17 9 16 10 15 14 8 13 10 12 3 11 9 10 7 9 3 8 6 7 4 6 3 5 4 3 2