C22212323232133313113313331333132313231333132311233123311232331211   >>    C2221232323213331311331333133313231323133313231123312331123233121   <<    C22212323232133313113313331333132313231333132311233123311232331213   >>      C22212323232133313113313331333132313231333132311233123311232331212   >>