C1112212323132313132313132313232233131323231323133313232213332321   >>    C111221232313231313231313231323223313132323132313331323221333232   <<    C1112212323132313132313132313232233131323231323133313232213332323   >>      C1112212323132313132313132313232233131323231323133313232213332322   >>