Rules: Shade some cells to form a single connected area with no 2x2 square completely shaded(only L,I,T,S tetrominoes will be used). Every outlined region must contain a tetromino as shaded cells. No two tetrominoes of the same shape may share an edge. Tetrominoes may be rotated or reflected. All shaded cells must be part of some tetromino. When two tetrominoes touch horizontally or vertically, they must be oriented perpendicularly, meaning, the longer side of the smallest bounding rectangle of one tetromino has to be horizontally oriented while the other tetromino's longer side has to be vertically oriented, and vice-versa.
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