C22212323232133313113313331333132313231333132313222133223211121   >>    C2221232323213331311331333133313231323133313231322213322321112   <<    C22212323232133313113313331333132313231333132313222133223211123   >>      C22212323232133313113313331333132313231333132313222133223211122   >>