C22212323232133313113313331333133313231333112123221322333121211   >>    C2221232323213331311331333133313331323133311212322132233312121   <<    C22212323232133313113313331333133313231333112123221322333121213   >>      C22212323232133313113313331333133313231333112123221322333121212   >>