Rules: Shade in some cells such that each outlined area contains exactly four shaded cells that form a tetromino. No 2×2 square may be shaded completely. All shapes must be connected to form a single contiguous group of shaded cells. Identical figures, regardless of rotation or reflection, may not share an edge. Any Xs mean the cell may not be shaded.
All identical outlined areas must contain the same tetromino, but no two dissimilar areas may use the same tetromino.
About: LITS Grouping was invented by Anurag Sahay in 2021.
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