Rules: Shade in some cells such that each outlined area contains four shaded cells that form a Tetromino. No 2×2 square can be shaded completely. All shapes must be connected to form a single contiguous group of shaded cells. Identical figures, regardless of rotation or reflection, cannot share an edge. Color coded bars on ome of the edges indicate that the two cells across the edge have the same combination of shading for all bars of the same color, and different for those of different colors. As an example, "L-I", "L-unshaded", "unshaded-unshaded" are some valid combinations.
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