W person facing left undo, object balancing on small triangle diamond on a rectangle base good, large upside down house on a rectangle
page9-28.png page5-100.png page2-38.png page4-73.png
page5-100.png page1-14.png page4-86.png page2-40.png page2-38.png page7-140.png page9-28.png page6-72.png page4-73.png page3-121.png
page4-73.png page5-100.png page9-28.png
undo, upside down trapezoid