a-a a-b a-c aaa aab aac aad aag aak aar aau ab- aba abb abc abd abg abk abr abu ac- aca acb acc acd acg ack acr acu ad- ada adb adc add adg adk adr adu ag- aga agb agc agd agg agk agr agu aka akb akc akd akg akk akr aku ar- ara arb arc ard arg ark arr aru au- aua aub auc aud aug auk aur b-u baa bab bac bad bag bak bar bau bba bbb bbc bbd bbg bbk bbr bbu bca bcb bcc bcd bcg bck bcr bcu bda bdb bdc bdd bdg bdk bdr bdu bga bgb bgc bgd bgg bgk bgr bgu bka bkb bkc bkg bkk bkr bra brb brd brg brk brr bru bua bub buc bud bug buk bur buu c-- caa cab cac cad cag cak car cau cba cbb cbc cbd cbg cbk cbr cbu cca ccb ccc ccd ccg cck ccr ccu cda cdb cdc cdd cdg cdk cdr cdu cga cgb cgc cgd cgg cgr cgu cka ckb ckc ckd cra crb crc crd crg crk crr cru cua cub cuc cud cug cuk cur cuu daa dab dac dad dag dak dar dau dba dbb dbc dbd dbg dbk dbr dbu dca dcb dcc dcd dcg dck dcr dcu dda ddb ddc ddd ddg ddk ddr ddu dga dgc dgd dgg dgk dgr dgu dka dkb dkc dkg dkk dkr dku dra drb drc drd drg drk drr dru dua dub duc dud dug duk dur g-d gaa gab gac gad gag gak gar gau gba gbc gbd gbg gbk gbr gbu gca gcb gcc gcd gcg gck gcr gcu gda gdb gdc gdd gdk gdr gdu gga ggb ggc ggd ggg ggr ggu gka gkb gkd gra grb grc grd grg grk grr gru gu- gua gub guc gud gug guk gur guu ka- kaa kab kac kad kag kak kar kau kba kbb kbc kbd kbk kbr kbu kca kcb kcc kcd kcg kck kcr kcu kda kdb kdc kdg kdk kdr kdu kga kgb kgc kgd kgu kkb kkc kkk kkr kku kra krc krd krg krk krr kru kub kuc kud kug kuk kur kuu ra- raa rab rac rad rag rak rar rau rba rbb rbc rbd rbg rbk rbr rbu rca rcb rcc rcd rcg rcr rcu rda rdb rdc rdd rdg rdr rdu rga rgb rgc rgd rgg rgk rgr rkb rkc rkg rkk rku rra rrb rrc rrd rrg rrk rrr rru rua rub ruc rud rug ruk rur ruu ua- uaa uab uac uad uag uak uar uau uba ubb ubc ubg ubk ubr ubu uca ucb ucc ucd ucg uck ucr ucu uda udb udc udd udg udk udr udu uga ugb ugc ugg ugk ugr ugu uka ukb ukc ukk ukr uku ur- ura urb urc urd urg urk urr uru uua uuc uug uur uuu

a-ak aaaa aaab aaac aaad aaar aaba aabb aabc aabd aaca aacb aacc aacd aack aacr aacu aada aadc aadu aaka aaku aara aarc aard aaru abaa abab abac abad abag abak abar abau abb- abba abbb abbr abca abcb abcc abcd abcr abda abdu abgd abra abrc abua abud abug abuk acaa acab acac acad acag acar acba acca accc accd accu acda acdb acdc acga acgr ackd acr- acra acrc acrr acu- acur adaa adab adac adad adag adak adar adba adbc adcc adda addc addd addr addu adra adua adub aduk adur agac agad agag agar agau agba agca agcc agda agga aggu agra agua agur akaa akar akca akka akku akr- akra akua arab arac arad arag arak arar arau arba arc- arca arda ardc ardu arga argb arka arr- arra arrc arrg arrk arrr arru arua arub arud arug auaa auca audc auga aur- aura aurd auug baaa baad baak baar baba babb babr babu bac- baca bacc back bada badb badd badr badu baga bagg bak- baka bakr baku bar- bara barb barc bard barg bark barr baru bau- baud baug bauk baur bbad bbau bbbb bbdd bbga bbrc bbrg bcaa bcar bcbc bcbg bcca bccc bcda bcra bcru bcuc bd-r bdbc bddc bgca bkgd brab brac brad brag brak brau brca brcb brda brka brkb brrr bruc brud brug buad buar buba bubb bubu buca bucc buck bucu buda budb budd budg budu buga bugg buka bukk buku bur- bura burb burd burg burk burr buru c-cd caaa caab caac caba cabg cabu cac- caca cacc cack cacr cada cadc cadd cadr cadu caga cagg cagr caka cara carb carc card cark carr cauc cauk cbac cbar cbbc cbca cbcc cbcr cbcu cbdb cbdc cbga cbgb cbka cbkg cbkr cbrd ccaa ccab ccac ccad ccag ccar ccba ccbc ccca cccb cccc cccu ccdc ccdr ccga ccgc ccra ccrc ccrg ccuc cd-r cdaa cdac cdad cdba cdda cddb cddr cgac cgcc cgcg ckac ckbc ckck ckdu ckga ckrc ckrd crab crac crag crar crau crbc crbu crca crcc crcr crda crdc crkc crub crud crug cruk cuau cub- cuba cubb cuca cucc cuck cuda cuga cuk- cuka cura curb curd curr daab daad daag daar daau daba dabb dabu daca dada dadu daga dagg dagr dagu daka daku dara darb darc dard darg dark darr daru daub daud dauk daur dbag dbar dbcc dcbc dcca dccb dccc dccu dcdb dcra dcrk dddd ddrc ddub dgac dgca dgka dgkb dgkd dgkg dkba dkdc draa drab drac drad drag drak drar drau drba drbc drca drda drra drua drub drug druk druu duaa duab duad duar dub- duba dubb dubc dubu duca duck duda dudd dudu duga dugu duka duku dura durg durk duru duur gaar gaba gabb gabr gabu gack gada gadd gadk gaga gagg gagu gaku gara garb gard garg garr gaua gaub gaud gauk gaur gbag gc-c gcaa gcbc gccc gcda gcrg gdca gddb gdrc gggg grab grac grad grau grbr grcc grdc grrr grua grub grug grur guaa guac guag guar guba gubb gubu guca guck