French fixed form - 19 lines long, but only uses two rhymes, while also repeating two lines throughout the poem. The first five stanzas are triplets, and the last stanza is a quatrain such that the rhyme scheme is as follows: "aba aba aba aba aba abaa." The tricky part is that the 1st and 3rd lines from the first stanza are alternately repeated such that the 1st line becomes the last line in the second stanza, and the 3rd line becomes the last line in the third stanza. The last two lines of the poem are lines 1 and 3 respectively, making a rhymed couplet. Examples are E. A. Robinson's The House on the Hill and Dylan Thomas' Do Not Go Gentle into that Good Night.