Sonnet
In a traditional "English" or "Shakespearean" sonnet, the first twelve lines are divided into three groups ("stanzas") of four lines each, called "quatrains". The last two lines usually rhyme, and make up a "rhymed couplet" that concludes the poem by summing up the story told in the previous quatrains. In the traditional "Italian" or "Petrarchan" sonnet, the poem divides into a group of eight lines ("octave") followed by a group of six lines ("sestet").