trying to interpret the output in light of the dostring:

```
Output: ``t, numk``, where ``numk`` is the number of the last ``k``
elements occurring in the combination ``t``.
```

so for

```
t, numkl = [2, 3, 5], 0
```

we have "0 being the number of the last 0 elements occurring in [2, 3, 5]" -- I can't make sense of that.