C222133313331333131123313231333133313331313113313331333131333132332313232212121   >>    C22213331333133313112331323133313331333131311331333133313133313233231323221212   <<    C222133313331333131123313231333133313331313113313331333131333132332313232212123   >>      C222133313331333131123313231333133313331313113313331333131333132332313232212122   >>