21 trunks form a triangle 6x6 m, 5x5...
21 trunks form a triangle 6x6 m, 5x5...
21 trunks form a triangle 6x6 m, 5x5...
21 trunks form a triangle 6x6 m, 5x5...
21 trunks form a triangle 6x6 m, 5x5...
21 trunks form a triangle 6x6 m, 5x5...
21 trunks form a triangle 6x6 m, 5x5...
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16 trunks form a cube (Wilderness...
16 trunks form a cube (Wilderness...
16 trunks form a cube (Wilderness...