C1112212323132313132313132313232233132333131323231323132313231221   >>    C111221232313231313231313231323223313233313132323132313231323122   <<    C1112212323132313132313132313232233132333131323231323132313231223   >>      C1112212323132313132313132313232233132333131323231323132313231222   >>