The Lamplighter's manor is 9 room house, which can be represented as 3x3 grid. Each room has a single lamp. When a lamp is lit, the lamps in each of the adjacent rooms light up if they are unlit, and darken if they are lit. Likewise, when a lamp is extinguished, the lamps in each of the adjacent rooms darken if they are lit, and light up if they are unlit. This does not include the rooms in diagonal, only those directly to the North, South, West and East, where it applies. We are allowed to light or darken any room, at any given time. Suppose the manor starts with all of its lights off, expect for the one in the very middle, in the second row and second column. What sequence(s) of action gets us to a fully lit manor? Here an action is to be understood as either lighting or darkening a room.