2576: Control Group

Placeble 228 x/6n⬜⬜⬜⬜⬜n⬜⬜⬜⬜⬜n⬜⬜⬜⬜⬜n⬜⬜⬜⬜⬜n⬜⬜⬜⬜⬜n⬜⬜⬜⬜⬜