C111122332133313231232313231313231323132322331323133311221123231211   >>    C11112233213331323123231323131323132313232233132313331122112323121   <<    C111122332133313231232313231313231323132322331323133311221123231213   >>      C111122332133313231232313231313231323132322331323133311221123231212   >>