C1111233131211111211113313331333133313331312331333131133133313232222231   >>    C111123313121111121111331333133313331333131233133313113313331323222223   <<    C1111233131211111211113313331333133313331312331333131133133313232222233   >>      C1111233131211111211113313331333133313331312331333131133133313232222232   >>