https://owlcation.com/humanities/Poetic-Forms-in-English-Literature
Triolet
It is a poem of 8 lines in which 1st, 4th, and 7th lines repeat, and 2nd and 8th lines also repeat. The rhyme scheme of the poem is AbaAabAB, capital letters representing the repeated lines. For instance: Thomas Hardy’s “Birds At Winter”.
How my heart sings 