- unit1-getting-to -> unit2-i-can-danc
- unit2-i-used-to- -> unit34
- unit4 -> unit6-chinese-he
- unit6-famous-sto -> unita-didattica-
- unita-didattica- -> unitat-1
- unitat-1 -> unitat-3-qu-pode
- unitat-3-qu-pode -> unitat-8
- unitat-8-atenci- -> unite-1-poems-li
- unite-2 -> unitech-residenc
- unitech-residenc -> united-arab-emir
- united-arab-emir -> united-dms-of-te
- united-electric -> united-kingdom
- united-kingdom -> united-kingdom-p
- united-kingdom-p -> united-methodist