C22212323232133313113313331333132313231333132212132312313221312121   >>    C2221232323213331311331333133313231323133313221213231231322131212   <<    C22212323232133313113313331333132313231333132212132312313221312123   >>      C22212323232133313113313331333132313231333132212132312313221312122   >>