C22212323232133313113313331333133313231323231311211212121223111   >>    C2221232323213331311331333133313331323132323131121121212122311   <<    C22212323232133313113313331333133313231323231311211212121223113   >>      C22212323232133313113313331333133313231323231311211212121223112   >>