C222123232321333131133133313331323133313231322132313121212321121   >>    C22212323232133313113313331333132313331323132213231312121232112   <<    C222123232321333131133133313331323133313231322132313121212321123   >>      C222123232321333131133133313331323133313231322132313121212321122   >>