D1212132333132233131113231313231323331323331333131323212331323331323221211111   >>    D121213233313223313111323131323132333132333133313132321233132333132322121111   <<    D1212132333132233131113231313231323331323331333131323212331323331323221211113   >>      D1212132333132233131113231313231323331323331333131323212331323331323221211112   >>