Theme: Bars of Fours
Rules: Shade in some cells such that all of the shaded cells form all the Pentomino shapes without repetition, and with rotation and reflection allowed. Shapes cannot be edge-adjacent with each other. In the end, all unpainted cells must be connected in a single group through other unpainted cells. Black circles in the grid represent spaces that must be contained in one of the shapes, whilst white or grey circles represent spaces that may not be contained in a shape. Additionally, cells with grey circles must have exactly one of their edge-adjacent cells occupied by a shape.