def home_HCM.html
rect (4,216) (100,290) http://escher.usr.dsi.unimi.it/imaging/HCM/ImageSynthe.html
rect (155,180) (250,290) http://escher.usr.dsi.unimi.it/imaging/HCM/ImageManip.html
rect (325,190) (410,290) http://escher.usr.dsi.unimi.it/imaging/HCM/Visualisation.html
rect (330,130) (445,160) http://escher.usr.dsi.unimi.it/imaging/HCM/About.html