C111112111133131121133133313331333132213331333131133133313223313223212312121   >>    C11111211113313112113313331333133313221333133313113313331322331322321231212   <<    C111112111133131121133133313331333132213331333131133133313223313223212312123   >>      C111112111133131121133133313331333132213331333131133133313223313223212312122   >>