arliē > arlȳro?
apparently the "correct solution" was changed to "arlȳr". i appreciate this as a step in the right direction. just add a little "o" and i'll be perfectly fine.
Arlȳro is incorrect when used before nouns.
What about "dāria arlyyro zenturliot ēdrus" which is another exercise in this lesson? Leaving out the 'o' there is marked as wrong.
Thank you for pointing this out! It has now been corrected.