C21221212121211331313232233131333133112212323132313231313223321   >>    C2122121212121133131323223313133313311221232313231323131322332   <<    C21221212121211331313232233131333133112212323132313231313223323   >>      C21221212121211331313232233131333133112212323132313231313223322   >>