These letters indicate the place the rhymes happen at the conclusion of the strains. In ABAB, the 1st and 3rd traces rhyme at the top, as do the next and fourth traces. In ABCB, just the 2nd and fourth lines rhyme at the top. The dictionary definition of Rhyme: A https://types-of-sticker75061.post-blogs.com/48709499/details-fiction-and-types-of-rhymes-in-poems