a-fu aaaa aaac aaaf aaal aaar aaca aacc aacf aacl aacr aacu aafa aafc aaff aafl aala aalc aall aalu aara aarc aaru acaa acac acar acca accc accf accu acfc acfl acla aclc aclr aclu acr- acra acrc acrr acu- acuf acul acur afaa afar afca afcc afcu affa affc afla aflc afr- afra afrc afru afua alaa alac alal alar alau alca alcc alfa all- alla alll allr allu alua aluf alur arac araf aral arar arau arc- arca arfa arfc arff arfu arla arr- arra arrc arrr arru arua arul auaa auca aufc aul- aula aulf aull aulu aur- aura caaa caac caaf caal cac- caca cacc cacr cafa cafc caff cafl cafu cala calc calf call calu cara carc carf carl carr cauc cauf caul ccaa ccac ccaf ccar ccca cccc cccf cccl cccu ccfa ccfc ccff ccfl ccla cclc ccra ccrc ccrf ccrl ccuc cfaa cfac cfar cfca cfcf cfcl cffr cfra claf clar clau clra crac craf crar crau crca crcc crcr crfc crfl crlf cuau cuca cucc cufa cufc cuff cula culc cull cura curf curl curr faaa faac faca facc fafa fafc faff fala falc fall falu fara farc farl farr faru faul faur fcal fcar fcca fccf fcra ffar ffcc ffff ffrr flac flcl fluf flur frac frau frcc frfc frla fuar fuc- fuca fufc fuff fufu fula full fulu fur- fura furl furr laaa laac laal laar laca lacc lacl lacu lafc laff lala lall lalu lara larc larf larr laru lauf laul laur lcac lcca lccc lcfc lcfr lcra lcrl lfca lfcc llcc lllc llll lrac lral lrfc lrrc lrrr luau luca luff lufu lula lull lulu lura luua raaf rac- raca racc racu rafa rafc raff rala ralf rall rara rarf raua rauc rauf raul rcac rcaf rccc rcfc rffc rffl rlua rrfc rrrr ruca rufa rufc ruff rula rull rura rurc ruru uaca uafa uarc uaru uaua ucal ucar ucca ucfa ucla ucrc ucua ufcu uffa ufra ulaa ular ulcc ulla ullr ulua ulul urac ural urau urca urfa urff urla urra urur uulu uuuu