C1123112323131323132313132313232233132333133313232223132313232211   >>    C112311232313132313231313231323223313233313331323222313231323221   <<    C1123112323131323132313132313232233132333133313232223132313232213   >>      C1123112323131323132313132313232233132333133313232223132313232212   >>