C1111233131211111211113313331333133313232313331333133313321133223121   >>    C111123313121111121111331333133313331323231333133313331332113322312   <<    C1111233131211111211113313331333133313232313331333133313321133223123   >>      C1111233131211111211113313331333133313232313331333133313321133223122   >>