C22212323232133313113313331333133313113313121223323232223123121   >>    C2221232323213331311331333133313331311331312122332323222312312   <<    C22212323232133313113313331333133313113313121223323232223123123   >>      C22212323232133313113313331333133313113313121223323232223123122   >>