Triolet
A triolet (/ˈtraɪ.əlᵻt/ or US /ˌtriː.əˈleɪ/) is a stanza poem of eight lines. Its rhyme scheme is ABaAabAB and often all lines are in iambic tetrameter: the first, fourth and seventh lines are identical, as are the second and final lines, thereby making the initial and final couplets identical as well.