C12121212311232322331313232233132333132313232223132313232213231   >>    C1212121231123232233131323223313233313231323222313231323221323   <<    C12121212311232322331313232233132333132313232223132313232213233   >>      C12121212311232322331313232233132333132313232223132313232213232   >>