Normal LITS rules apply. Ie Shade one tetromino in each region. (A tetromino is a shape of four orthogonally-connected cells.) No two tetrominoes of the same shape may share an edge - reflections/rotations count as the same shape. All tetrominoes must form a single orthogonally connected area. No 2x2 area of the grid can be completely shaded. Additionally, each row, column and region must contain exactly one white star and one black star. Black stars must be located on tetrominoes, and white stars must not. Regardless of colour, stars may not touch each other - not even diagonally.