D1212132333132233131113231313231333131323223313232313231312312111   >>    D121213233313223313111323131323133313132322331323231323131231211   <<    D1212132333132233131113231313231333131323223313232313231312312113   >>      D1212132333132233131113231313231333131323223313232313231312312112   >>