Featured Puzzle: L.I.T.S. #3

Shade four cells in each region to place exactly one L, I, T, or S-tetromino there.

• Shaded cells must form an orthogonally contiguous area.
• Each tetromino may be rotated or reflected.
• Tetrominoes of the same type may not share any part of an edge. Touching diagonally is allowed.
• Shaded cells may not cover any 2×2 area.