Today's odes are often rhyming poetry with an irregular meter, however rhyme is not needed. They are divided into stanzas (the "paragraphs" of poetry) of 10 lines each, with three to five stanzas in total. Within a given ode, different groups of poets may have different numbers of stanzas; there is no set number per se. Early Chinese odes were not necessarily rhymed. The first recorded use of rhyme in China was in a poem by Bai Juyi (772-846), though it is possible that earlier poems used alliteration instead. Rhyme is popular again today, especially in Japan where many modern-style poems are composed in tanka form. In English, too, some recent poets have been experimenting with rhyme and meter in their work, such as Robert Graves and John Milton. The odes of Horace are usually quoted as an example of how not to do it wrong. He perfected the art of the epode, which has six feet (1.8 meters) and one rhyme scheme: abcdefg. Most classical odes, therefore, follow this pattern: two epodes plus alcaics or iambic trimeters where necessary. However, not all Greek and Roman poets adhered to these rules.