Keep highest AND ones ?

Hello everyone ! I was wondering : Is it possible to do a roll system where you keep a certain amount of highests rolls, but giving a priority to ones to the lowest kept ? I might be not very clear, so here's an exemple : I roll 18 dices, and I have to keep 7 of them. I roll a 1, 3, 8, 2, 8, 10, 9, 6, 3, 10, 1, 2, 10, 2, 3, 1, 2, 7. So I should keep a 8, 8, 10, 9, 10, 10 and 7, but since I have three 1, I would like it to be : 1, 1, 1, 9, 10, 10, 10. Would it be possible ?

I can't think of a way to do this in the native dice roller. You could do it with an API script (pro perk), but short of that I can't think of a way to handle it. Edit: Using the native dice roller, you're best bet might be to use the sort function, and then just mentally add the results you are keeping together: /r 18d20sa