C22212323232133313113313331333132313231333132311233123111223221   >>    C2221232323213331311331333133313231323133313231123312311122322   <<    C22212323232133313113313331333132313231333132311233123111223223   >>      C22212323232133313113313331333132313231333132311233123111223222   >>