C222123232321333131133133313331323133313231333133332212322132112121   >>    C22212323232133313113313331333132313331323133313333221232213211212   <<    C222123232321333131133133313331323133313231333133332212322132112123   >>      C222123232321333131133133313331323133313231333133332212322132112122   >>