C222123232321333131133133313331323133313231322132313121212112121   >>    C22212323232133313113313331333132313331323132213231312121211212   <<    C222123232321333131133133313331323133313231322132313121212112123   >>      C222123232321333131133133313331323133313231322132313121212112122   >>