"They are living in a new house."
Translation:Arlȳr lentot glaesis.
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.
What about "dāria arlyyro zenturliot ēdrus" which is another exercise in this lesson? Leaving out the 'o' there is marked as wrong.