C22212323232133313113313331333132313231333132313222132231231211   >>    C2221232323213331311331333133313231323133313231322213223123121   <<    C22212323232133313113313331333132313231333132313222132231231213   >>      C22212323232133313113313331333132313231333132313222132231231212   >>