## another graph question concerning paths

Find all paths from x to f in the graph.

I found xabcf, xabef, xadef, xdabcf, xdabef, xdef, xadebcf, xdebcf.
Somehow the last two were not included as answers in the solution.
Is there a reason why these two are not paths? Or is this just a mistake on the authors' behalf?