a-fu aaaa aaac aaad aaaf aaal aaca aacc aacd aacf aacl aacu aada aadc aadu aafa aafc aafd aaff aafl aala aalc aald aall aalu acaa acac acad acca accc accd accf accu acda acdc acdf acfc acfd acfl acla aclc aclu acu- acuf acul adaa adac adad adal adcc adda addc addd addl addu adfa adfc adfl adua afaa afad afca afcc afcu afdc afdl affa affc afla aflc afua afud alaa alac alad alal alau alca alcc ald- alda aldl alfa all- alla alll allu alua aluf auaa auca audc aufc aul- aula auld aulf aull aulu c-cd caaa caac caaf caal cac- caca cacc cada cadc cadd cadu cafa cafc caff cafl cafu cala calc cald calf call calu cauc cauf caul ccaa ccac ccad ccaf ccca cccc cccf cccl cccu ccdc ccdf ccfa ccfc ccfd ccff ccfl ccla cclc ccuc cdaa cdac cdad cdda cddl cdfa cfaa cfac cfca cfcf cfcl cfda clad claf clau clcd cldc clud cuau cuca cucc cuda cufa cufc cuff cula culc culd cull daad daal daau daca dada dadu dafa dafc daff dala dalf dall dalu daud dcca dccc dccl dccu dcfc dddd ddlc dfaf dfcc dfcu dffa duaa duad dual duca duda dudd dudu dufc duff dufu dula dulc dull dulu duul faaa faac faad faca facc fada fadd fafa fafc faff fala falc fald fall falu faud faul fcal fcca fccf fcda fdca ffcc ffff flac flad flcl flud fluf fuad fuc- fuca fuda fudd fufc fuff fufu fula full fulu laaa laac laad laal laca lacc lacl lacu lada ladd ladu lafc laff lala lald lall lalu laud lauf laul lcac lcad lcca lccc lcdd lcfc ldcf lfca lfcc llcc lldc lllc llll llud luau luca luda ludd luff lufu lula lull lulu luua uaca uafa uald uaua ucad ucal ucca ucdc ucdd ucfa ucla ucua udaa udad udal udau udca ufcu uffa ulaa ulad ulcc ulla ulua ulul uulu uuuu