C111122332133313231232313231313231323132322331323131123313133112121   >>    C11112233213331323123231323131323132313232233132313112331313311212   <<    C111122332133313231232313231313231323132322331323131123313133112123   >>      C111122332133313231232313231313231323132322331323131123313133112122   >>