gistfile1.txt

You're lifting weights in a gym, because that's what you're in to. This gym is 
filled with a weird kind of bar bell bar which can only fit one weight on each 
end of it. 

Frustratingly, the weights might not be evenly matched. You want to do some 
with as even a weight as possible. So you need to find the two weights 
with the closest weight to each other.

Your input will be an array of weights, for example [2,10,15,25].

Your output should be an array containing the two weights which have the
closest weight to each other.

In that case, the output would be [10,15]. (Your right arm is stronger than 
your left, so put the heavier weight on the right.) In case of ties, pick the 
heaviest pair, because you're a gym bro like that.