C22212323232133313113313331333133313231333112123221232113121121   >>    C2221232323213331311331333133313331323133311212322123211312112   <<    C22212323232133313113313331333133313231333112123221232113121123   >>      C22212323232133313113313331333133313231333112123221232113121122   >>