evaluation depth goes only to min length

[nikozoe]

In your implementation the loop only goes to

k = min(self.N_S, self.N_T, k)

However, I think it should go to the maximum. For example $S=[1,2,3,4]$ and $T=[2]$ results in $rbo = 0$ in your implementation, although there clearly is an overlap at depth 2.

[jermp]

You would have an obvious out of range error, as you would try to access elements from the smaller lists at positions that do not exist.