A villanelle is a 19-line poem composed of five tercets and a quatrain at the end. Lines can be any length, although they are usually written in iambic pentameter with an ABA rhyme scheme. Line repetition is also used in the villanelle. The first three lines of each section of the poem should all begin with the same word or phrase to create a pattern that links the sections together. In terms of meter, the villanelle is similar to a sonnet: it has 14 lines divided into two parts of seven lines each. But while a sonnet follows the formal order of AA BB CC DD EE FF GG, a villanelle is free to rearrange its material any way it chooses. Also unlike a sonnet, which is limited to words of the English language, a villanelle can use any language's words or even make up new words if it wants to. A common theme among many villanelles is love - either romantic love or hatred/distrust.