a-a a-b a-c aaa aab aac aad aag aak aan aao aar aau ab- aba abb abc abd abg abk abn abo abr abu ac- aca acb acc acd acg ack acn aco acr acu ad- ada adb adc add adg adk adn ado adr adu ag- aga agb agc agd agg agk agn ago agr agu aka akb akc akd akg akk akn ako akr aku an- ana anb anc and ang ank ann ano anr anu aoa aob aoc aod aog aok aon aoo aor aou ar- ara arb arc ard arg ark arn aro arr aru au- aua aub auc aud aug auk aun auo aur b-u baa bab bac bad bag bak ban bao bar bau bba bbb bbc bbd bbg bbk bbn bbo bbr bbu bca bcb bcc bcd bcg bck bcn bco bcr bcu bda bdb bdc bdd bdg bdk bdo bdr bdu bga bgb bgc bgd bgg bgk bgn bgo bgr bgu bka bkb bkc bkg bkk bkn bko bkr bna bnb bnc bnd bng bnk bnn bno bnr bnu boa bob boc bod bog bok bon boo bor bou bra brb brd brg brk brn bro brr bru bua bub buc bud bug buk bun buo bur buu c-- caa cab cac cad cag cak can cao car cau cba cbb cbc cbd cbg cbk cbn cbo cbr cbu cca ccb ccc ccd ccg cck ccn cco ccr ccu cda cdb cdc cdd cdg cdk cdn cdo cdr cdu cga cgb cgc cgd cgg cgn cgo cgr cgu cka ckb ckc ckd cko cn- cna cnb cnc cnd cng cnn cno cnr cnu co- coa cob coc cod cog cok con coo cor cou cra crb crc crd crg crk crn cro crr cru cua cub cuc cud cug cuk cun cuo cur cuu daa dab dac dad dag dak dan dao dar dau dba dbb dbc dbd dbg dbk dbn dbo dbr dbu dca dcb dcc dcd dcg dck dcn dco dcr dcu dda ddb ddc ddd ddg ddk ddn ddo ddr ddu dga dgc dgd dgg dgk dgn dgr dgu dka dkb dkc dkg dkk dko dkr dku dna dnb dnc dnd dng dnk dnn dno dnr doa dob doc dod dog dok don doo dor dou dra drb drc drd drg drk drn dro drr dru dua dub duc dud dug duk dun duo dur g-d gaa gab gac gad gag gak gan gao gar gau gba gbc gbd gbg gbk gbn gbo gbr gbu gca gcb gcc gcd gcg gck gcn gco gcr gcu gda gdb gdc gdd gdk gdn gdo gdr gdu gga ggb ggc ggd ggg ggn ggo ggr ggu gka gkb gkd gkn gko gna gnb gnc gnd gnn gno gnr gnu goa gob goc god gog gok gon goo gor gou gra grb grc grd grg grk grn gro grr gru gu- gua gub guc gud gug guk gun guo gur guu ka- kaa kab kac kad kag kak kan kao kar kau kba kbb kbc kbd kbk kbn kbo kbr kbu kca kcb kcc kcd kcg kck kcn kcr kcu kda kdb kdc kdg kdk kdo kdr kdu kga kgb kgc kgd kgo kgu kkb kkc kkk kkn kkr kku kn- kna knc knd kng knk knn kno knr knu koa kob koc kod kog kok kon koo kor kou kra krc krd krg krk krn kro krr kru kub kuc kud kug kuk kun kur kuu naa nab nac nad nag nak nan nao nar nau nba nbb nbc nbd nbg nbk nbn nbo nbr nbu nca ncb ncc ncd ncg nck ncn nco ncr ncu nda ndb ndc ndd ndg ndk ndn ndo ndr ndu nga ngb ngc ngd ngg ngk ngn ngo ngu nka nkc nkk nkn nko nkr nku nna nnb nnc nng nnk nnn nno nnu no- noa nob noc nod nog nok non noo nor nou nra nrb nrc nrd nrg nrk nrn nro nrr nru nua nub nuc nud nug nuk nun nuo nur nuu oaa oab oac oad oag oak oan oao oar oau ob- oba obb obc obd obg obk obn obo obr obu oc- oca ocb occ ocd ocg ock ocn oco ocr ocu oda odb odc odd odg odn odo odr odu oga ogc ogd ogg ogn ogo oka okb okc okd okg okk oko okr oku on- ona onb onc ond ong onk onn ono onr onu oo- ooa oob ooc ood oog ook oon ooo oor or- ora orb orc ord org ork orn oro orr oru ou- oua ouc oud ouk oun ouo our ra- raa rab rac rad rag rak ran rao rar rau rba rbb rbc rbd rbg rbk rbn rbo rbr rbu rca rcb rcc rcd rcg rcn rco rcr rcu rda rdb rdc rdd rdg rdn rdo rdr rdu rga rgb rgc rgd rgg rgk rgn rgo rgr rkb rkc rkg rkk rko rku rna rnb rnc rnd rng rnn rno rnr rnu roa rob roc rod rog rok ron roo ror rou rra rrb rrc rrd rrg rrk rrn rrr rru rua rub ruc rud rug ruk run ruo rur ruu ua- uaa uab uac uad uag uak uan uao uar uau uba ubb ubc ubg ubk ubn ubo ubr ubu uca ucb ucc ucd ucg uck ucn uco ucr ucu uda udb udc udd udg udk udn udo udr udu uga ugb ugc ugg ugk ugn ugo ugr ugu uka ukb ukc ukk ukn ukr uku un- una unb unc und ung unk unn uno unr unu uoa uob uoc uod uog uok uon uoo uor ur- ura urb urc urd urg urk urn uro urr uru uua uuc uug uun uur uuu