Programming Exercise #1

[Kristi]

So, there is a lot of help around here dealing with syntax of scripting, but I don't see much discussion on best algorithms. Be this the case, I am going to every so often (when I feel like it) post some mathematically cool problem for you all to help each other solve and break some mental barriers.

Problem 1.
Given 2 arrays of numbers, find all the sets of 3 numbers that both arrays have in common.

Remember, the goal is to make this as efficient as possible with graal script.

Edit: For clarification, this is a sample
If you have the following two sets
{2,3,5,6,8,10}
{1,5,3,10,6,9,2}

All of the sets of 3 would be
{2,3,5} {2,3,6} {2,3,10} {2,5,6} {2,5,10} {2,6,10} {3,5,6} {3,5,10} {3,6,10} {5,6,10}

New Edit: Let's do unique sets. If you have two sets of {1,1,2,3}, then the answer is {1,2,3}, not {1,2,3} {1,2,3}