C22212323232133313113313331333132313231333132313222132312322121   >>    C2221232323213331311331333133313231323133313231322213231232212   <<    C22212323232133313113313331333132313231333132313222132312322123   >>      C22212323232133313113313331333132313231333132313222132312322122   >>