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Theme: Symmetry and logic.
Rules: Variation of standard Fillomino rules. All polyominoes of same size besides 4 cannot touch. But all tetrominoes must be connected to form a valid LITS solution. All 4 clues have been replaced by tetromino letters.
Answer String: For each cell in the marked rows, enter the area of the polyomino it belongs to. For the tetrominoes, instead of numbers use capital letters (L, I, T, S) in the appropriate cells. Start with the 10th column, followed by a comma, followed by the 14th column.
Time Standards (highlight to view): Grandmaster = 12:30, Master = 18:00, Expert = 36:00