The Quatrain of Seven Steps seven strides such that Cao Pi is convinced of his innocence. Cao Zhi does so, and Cao Pi becomes so flustered with emotion that he spares his brother, although he later exacts punishment upon Cao Zhi in the form of demotion. The poem itself is written in the traditional "five-character quatrain" style and is an extended metaphor that describes the relationship of two brothers and the ill-conceived notion of one harming the other over petty squabbling. There exists two versions of the poem, one being six lines in length and the other four. The former is generally thought to be
Burns stanza lyrical, subsequent uses have tended to be comic and satirical, as this passage from Burns shows: A variation on the Burns stanza employs the rhyme scheme AABCCCB, with foreshortened third and seventh lines. This form is deployed, for example, in W. H. Auden's poem "Brother, who when the sirens roar" (also known as "A Communist to Others"): Brothers, who when the sirens roar From office, shop and factory pour By cops directed to the fug Of talkie-houses for a drug, Or down canals to find a hug Auden uses similar verse forms in other poems in the collection "Look, Stranger!"