a-a a-b a-c aaa aab aac aag aan aao aar aau ab- aba abb abc abg abn abo abr abu ac- aca acb acc acg acn aco acr acu ag- aga agb agc agg agn ago agr agu an- ana anb anc ang ann ano anr anu aoa aob aoc aog aon aoo aor aou ar- ara arb arc arg arn aro arr aru au- aua aub auc aug aun auo aur b-u baa bab bac bag ban bao bar bau bba bbb bbc bbg bbn bbo bbr bbu bca bcb bcc bcg bcn bco bcr bcu bga bgb bgc bgg bgn bgo bgr bgu bna bnb bnc bng bnn bno bnr bnu boa bob boc bog bon boo bor bou bra brb brg brn bro brr bru bua bub buc bug bun buo bur buu c-- caa cab cac cag can cao car cau cba cbb cbc cbg cbn cbo cbr cbu cca ccb ccc ccg ccn cco ccr ccu cga cgb cgc cgg cgn cgo cgr cgu cn- cna cnb cnc cng cnn cno cnr cnu co- coa cob coc cog con coo cor cou cra crb crc crg crn cro crr cru cua cub cuc cug cun cuo cur cuu gaa gab gac gag gan gao gar gau gba gbc gbg gbn gbo gbr gbu gca gcb gcc gcg gcn gco gcr gcu gga ggb ggc ggg ggn ggo ggr ggu gna gnb gnc gnn gno gnr gnu goa gob goc gog gon goo gor gou gra grb grc grg grn gro grr gru gu- gua gub guc gug gun guo gur guu naa nab nac nag nan nao nar nau nba nbb nbc nbg nbn nbo nbr nbu nca ncb ncc ncg ncn nco ncr ncu nga ngb ngc ngg ngn ngo ngu nna nnb nnc nng nnn nno nnu no- noa nob noc nog non noo nor nou nra nrb nrc nrg nrn nro nrr nru nua nub nuc nug nun nuo nur nuu oaa oab oac oag oan oao oar oau ob- oba obb obc obg obn obo obr obu oc- oca ocb occ ocg ocn oco ocr ocu oga ogc ogg ogn ogo on- ona onb onc ong onn ono onr onu oo- ooa oob ooc oog oon ooo oor or- ora orb orc org orn oro orr oru ou- oua ouc oun ouo our ra- raa rab rac rag ran rao rar rau rba rbb rbc rbg rbn rbo rbr rbu rca rcb rcc rcg rcn rco rcr rcu rga rgb rgc rgg rgn rgo rgr rna rnb rnc rng rnn rno rnr rnu roa rob roc rog ron roo ror rou rra rrb rrc rrg rrn rrr rru rua rub ruc rug run ruo rur ruu ua- uaa uab uac uag uan uao uar uau uba ubb ubc ubg ubn ubo ubr ubu uca ucb ucc ucg ucn uco ucr ucu uga ugb ugc ugg ugn ugo ugr ugu un- una unb unc ung unn uno unr unu uoa uob uoc uog uon uoo uor ur- ura urb urc urg urn uro urr uru uua uuc uug uun uur uuu

-ana a-un aaaa aaab aaac aaan aaar aaba aabb aabc aaca aacb aacc aacn aaco aacr aacu aana aang aaon aaoo aara aarc aaro aaru abaa abab abac abag aban abar abau abb- abba abbb abbo abbr abca abcb abcc abcn abcr abnu aboa abob abon aboo abor abou abra abrc abro abua abug abun acaa acab acac acag acan acar acba acca accc acco accu acga acgr acoa acog acon acor acou acr- acra acrc acro acrr acu- acuo acur ag-o agac agag agan agao agar agau agba agbo agca agcc agco agga aggu agna agno agob agog agon agoo agou agra agro agua agun agur ana- anaa anab anac anag anan anao anar anau anba anbb anbo anbu anca ancc anco ang- anga ango angu anna annb anno ano- anoa anon anor anrc anua anub anun aoba aoca aonb aono aora aorb aorn aoun arab arac arag aran arar arau arba arc- arca arco arga argb argo arna arng arno aroa arob aron aroo aror arr- arra arrc arrg arro arrr arru arua arub arug arun auaa auca auga auna aung aur- aura auro auug baaa baan baar baba babb babo babr babu bac- baca bacc bacn baco baga bagg bagn bago bana banc bang bann bano banr banu baon bar- bara barb barc barg barn baro barr baru bau- baug baur bbau bbbb bbga bbng bbrc bbrg bcaa bcar bcbc bcbg bcca bccc bcnu bcor bcra bcru bcuc bgan bgca bgon bgun bnoc bnor bnrr boab boac boag boan boar boba bobb bobo bobu boca boco bocu boga bogg bogo bona bonc bong bonn bono bonu boob booc boog boon boor bor- bora borg born boro borr boru boua boun bour brab brac brag bran brao brau brca brcb brna brno broa brob broc brog bron broo bror brou brrr bruc brug brun buar buba bubb bubo bubu buca bucc buco bucu buga bugg bugo buna bunb bung bunn buno bunu buon bur- bura burb burg burn buro burr buru c-bo caaa caab caac caan caba cabg cabo cabu cac- caca cacc caco cacr caga cagg cagn cago cagr cana canc cang cann cano caor cara carb carc carn caro carr cauc cauo cbac cbar cbbc cbca cbcc cbcn cbcr cbcu cbga cbgb cbna cbrn ccaa ccab ccac ccag ccar ccba ccbc ccbn ccca cccb cccc cccu ccga ccgc ccna ccnb ccnc ccnr ccnu ccob ccoc ccra ccrc ccrg ccuc cgac cgcc cgcg cgro cnaa cnac cnag cnbc cnco cnna cnrc cnrr coag coan coba cobb cobo cobu coca coco cocu cogo con- cona conc cong conn cono coob coon cor- cora corb corc corg corn coro corr coua coub coun cour crab crac crag cran crar crau crbc crbu crca crcc crcr crna crob croc cron croo cror crub crug crun cuan cuau cub- cuba cubb cuca cucc cucn cuga cuna cuno cuon cura curb curn curo