C22212323232133313113313331333133313231333112123221223211313211   >>    C2221232323213331311331333133313331323133311212322122321131321   <<    C22212323232133313113313331333133313231333112123221223211313213   >>      C22212323232133313113313331333133313231333112123221223211313212   >>