C22212323232133313113313331333133313231333112123221223313323121   >>    C2221232323213331311331333133313331323133311212322122331332312   <<    C22212323232133313113313331333133313231333112123221223313323123   >>      C22212323232133313113313331333133313231333112123221223313323122   >>