《宋书·志·卷二十二》
上为《克官渡曲》共一句，每句三字，一句五字，九句每句四字。
右《克官渡曲》凡十八句，其八句句三字，一句句五字，九句句四字。
The above is a sentence from the song "Defeating Guandu", each sentence has three characters, except for one sentence which has five characters, nine sentences each have four characters.