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You land in the square 9A11D, and find yourself in front of a large door with a strange looking lock. There is a bin of blocks shaped like Tetris pieces, and a shape in the door, with instructions next to it - you need to find a way to fill the shape fully with Tetris pieces, and only then will it open. However, no two pieces of the same shape (including rotations and reflections) can touch. How do you place these Tetris pieces in the door? Enter the string of color codes (listed on the tetrominoes) for purple highlighted boxes as a password at to unlock the door.

4.1 Tetromino Pegs






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