C1111233131211111211113313331333133313232313331333131133132323322121   >>    C111123313121111121111331333133313331323231333133313113313232332212   <<    C1111233131211111211113313331333133313232313331333131133132323322123   >>      C1111233131211111211113313331333133313232313331333131133132323322122   >>