Proof: https://en.wikipedia.org/wiki/Substitutions_of_the_Esperanto_alphabet Like I said, I’m Gonna be gone for Japan, So, Right now, I’m in Japan, BTW I Need this for my Esperanto Lore. And Ŭ's Alternate Form is UX.
Credit to DZS. Update: added Proof, Should say that The Digraphs are used to replace ĉ, ĝ, ĥ, ĵ, ŝ and ŭ.