C22212323232133313113313331333133313231323231311211223133322121   >>    C2221232323213331311331333133313331323132323131121122313332212   <<    C22212323232133313113313331333133313231323231311211223133322123   >>      C22212323232133313113313331333133313231323231311211223133322122   >>