D1212121212131323223313233231323133313231323331311233132322112113231   >>    D121212121213132322331323323132313331323132333131123313232211211323   <<    D1212121212131323223313233231323133313231323331311233132322112113233   >>      D1212121212131323223313233231323133313231323331311233132322112113232   >>