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
Viriato Trágico (poem) The poem, like many other epic works of 17th-century Portuguese literature, is written in ottava rima ("oitava rima" in Portuguese). This eight-line stanza of Italian origin is composed of hendecasyllabic lines rhymed "abababcc". The form was introduced into epic poetry by Giovanni Boccaccio in the 14th century. Soon it became very popular in Italy. In the beginning of the 16th century Francisco de Sá de Miranda, returning home from a stay in Italy, imported it into Portuguese poetry. This stanza was chosen by Luís de Camões for his "Lusiads". Many other poets used this form in the 17th century, including