public static byte[] allianceRankChange(int aid, String[] ranks) {
            MaplePacketLittleEndianWriter mplew = new MaplePacketLittleEndianWriter();

            mplew.writeShort(SendPacketOpcode.GUILD_OPERATION.getValue());
            mplew.write(26);
            mplew.writeInt(aid);
            for (String r : ranks) {
                mplew.writeMapleAsciiString(r);
            }

            return mplew.getPacket();
        }