R yu yan chu xue zhi nan/ Mi chuan shan xue zhi nan/ Xin hun yi xue zhi nan/ Ying guo liu xue zhi nan/ Pu lin si dun shu xue zhi nan / Haskell qu xue zhi nan/ Ji chu ying yu xie zuo zhi nan/ Gu dai han yu ju xing chu xue zhi nan/ Xun hui wai wu yuan zhi nan/ Hive bian cheng zhi nan/