C22212323232133313113313331333132313331323133313332331132223321232212121   >>    C2221232323213331311331333133313231333132313331333233113222332123221212   <<    C22212323232133313113313331333132313331323133313332331132223321232212123   >>      C22212323232133313113313331333132313331323133313332331132223321232212122   >>