Also called Petrarchan sonnet, it rimes the octave (the first 8 lines) a, b, b, a, a, b, b, a; the sestet (last 6 lines) may follow any rime pattern, as long as it does not end in a couplet. The poem traditionally turns, or shifts in mood or tone after the octave. A device used to produce figurative language. Many compare dissimilar things. Examples are apostrophe, hyperbole, irony, metaphor, metonomy, oxymoron, paradox, personification, simile, synecdoche, and understatement.