-al a-a a-b a-c aaa aab aac aad aaf aak aal aar aau ab- aba abb abc abd abf abk abl abr abu ac- aca acb acc acd acf ack acl acr acu ad- ada adb adc add adf adk adl adr adu af- afa afb afc afd aff afk afl afr afu aka akb akc akd akk akl akr aku al- ala alb alc ald alf alk all alr alu ar- ara arb arc ard arf ark arl arr aru au- aua aub auc aud auf auk aul aur b-u baa bab bac bad baf bak bal bar bau bba bbb bbc bbd bbf bbk bbl bbr bbu bca bcb bcc bcd bcf bck bcl bcr bcu bda bdb bdc bdd bdf bdk bdl bdr bdu bfa bfb bfc bfd bff bfl bfr bfu bka bkb bkc bkf bkk bkl bkr bla blb blc bld blf blk bll blr blu bra brb brd brf brk brl brr bru bua bub buc bud buf buk bul bur buu c-- caa cab cac cad caf cak cal car cau cba cbb cbc cbd cbf cbk cbl cbr cbu cca ccb ccc ccd ccf cck ccl ccr ccu cda cdb cdc cdd cdf cdk cdl cdr cdu cfa cfb cfc cfd cff cfk cfl cfr cfu cka ckb ckc ckd cl- cla clb clc cld clf clk cll clr clu cra crb crc crd crf crk crl crr cru cua cub cuc cud cuf cuk cul cur cuu daa dab dac dad daf dak dal dar dau dba dbb dbc dbd dbf dbk dbl dbr dbu dca dcb dcc dcd dcf dck dcl dcr dcu dda ddb ddc ddd ddf ddk ddl ddr ddu dfa dfb dfc dfd dff dfk dfl dfr dfu dka dkb dkc dkk dkl dkr dku dl- dla dlb dlc dld dlf dlk dll dlr dlu dra drb drc drd drk drl drr dru dua dub duc dud duf duk dul dur faa fab fac fad faf fak fal far fau fba fbb fbc fbd fbf fbk fbl fbr fbu fca fcb fcc fcd fcf fck fcl fcr fcu fda fdb fdc fdd fdf fdk fdl fdr fdu ffa ffc ffd fff ffk ffl ffr ffu fka fkb fkc fkf fkk fkl fla flb flc fld flf fll flr flu fra frb frc frd frf frk frl frr fru fua fub fud fuf fuk ful fur fuu ka- kaa kab kac kad kaf kak kal kar kau kba kbb kbc kbd kbf kbk kbl kbr kbu kca kcb kcc kcd kck kcl kcr kcu kda kdb kdc kdf kdk kdl kdr kdu kfa kfc kfd kff kfu kkb kkc kkk kkl kkr kku kl- kla klb klc kld klf klr klu kra krc krd krf krk krl krr kru kub kuc kud kuk kul kur kuu la- laa lab lac lad laf lak lal lar lau lba lbb lbc lbd lbf lbk lbl lbr lbu lca lcb lcc lcd lcf lck lcl lcr lcu lda ldb ldc ldd ldf ldk ldl ldr ldu lfa lfb lfc lfd lff lfk lfl lfr lfu lka lkb lkl lkr lla llb llc lld llf llk lll llr llu lra lrb lrc lrd lrf lrk lrr lru lua lub luc lud luf luk lul lur luu ra- raa rab rac rad raf rak ral rar rau rba rbb rbc rbd rbf rbk rbl rbr rbu rca rcb rcc rcd rcf rcl rcr rcu rda rdb rdc rdd rdf rdl rdr rdu rfa rfb rfc rfd rff rfk rfl rfr rfu rkb rkc rkf rkk rku rla rlc rld rlf rll rlr rlu rra rrb rrc rrd rrf rrk rrl rrr rru rua rub ruc rud ruf ruk rur ruu ua- uaa uab uac uad uaf uak ual uar uau uba ubb ubc ubf ubk ubl ubr ubu uca ucb ucc ucd ucf uck ucl ucr ucu uda udb udc udd udf udk udl udr udu ufa ufc ufd uff ufl ufr ufu uka ukb ukc ukf ukk ukl ukr uku ula ulb ulc uld ulf ulk ull ulr ulu ur- ura urb urc urd urf urk url urr uru uua uuc uur uuu

a-ak a-fu aaaa aaab aaac aaad aaaf aaal aaar aaba aabb aabc aabd aabl aaca aacb aacc aacd aacf aack aacl aacr aacu aada aadc aadu aafa aafb aafc aafd aaff aafl aaka aaku aala aalc aald aall aalu aara aarc aard aaru abaa abab abac abad abaf abak abal abar abau abb- abba abbb abbr abca abcb abcc abcd abcf abcl abcr abda abdu abff abla abra abrc abua abud abuf abuk abul acaa acab acac acad acar acba acbl acca accc accd accf accu acda acdb acdc acdf acfc acfd acfl ackd acla aclc aclr aclu acr- acra acrc acrr acu- acuf acul acur adaa adab adac adad adak adal adar adba adbc adcc adda addc addd addl addr addu adfa adfc adfl adra adua adub aduk adur afaa afad afak afar afca afcb afcc afcu afdb afdc afdl affa affc afka afkr afla aflc afr- afra afrc afru afua afud akaa akal akar akca akka akku akr- akra akua alaa alac alad alak alal alar alau alb- alba albc albu alca alcc ald- alda aldl alfa alk- alka alkb alkd alku all- alla alll allr allu alua aluf aluk alur arab arac arad araf arak aral arar arau arba arc- arca arda ardc ardf ardl ardu arfa arfb arfc arff arfu arka arla arr- arra arrc arrk arrr arru arua arub arud arul auaa auca audc aufc aul- aula auld aulf aull aulu aur- aura aurd baaa baad baaf baak baal baar baba babb babr babu bac- baca bacc back bada badb badd badr badu bafc baff bak- baka bakl bakr baku bala balc bald balf balk ball balu bar- bara barb barc bard barf bark barr baru bau- baud bauf bauk baul baur bbad bbau bbbb bbdd bbfc bblb bbrc bcaa bcar bcbc bcca bccc bccl bcda bcfc bcra bcru bcuc bd-r bdbc bddc bduf