C131312213233313231313231323232132313231313232233132333132313232211212311   >>    C13131221323331323131323132323213231323131323223313233313231323221121231   <<    C131312213233313231313231323232132313231313232233132333132313232211212313   >>      C131312213233313231313231323232132313231313232233132333132313232211212312   >>