a-a a-b a-c aaa aab aac aag aan aao aar aas aau aay ab- aba abb abc abg abn abo abr abs abu aby ac- aca acb acc acg acn aco acr acs acu acy ag- aga agb agc agg agn ago agr ags agu agy an- ana anb anc ang ann ano anr ans anu any aoa aob aoc aog aon aoo aor aos aou ar- ara arb arc arg arn aro arr ars aru ary as- asa asb asc asg asn aso asr ass asu asy au- aua aub auc aug aun auo aur aus ay- aya ayc ayn ayo ayr ays ayu b-u baa bab bac bag ban bao bar bas bau bay bba bbb bbc bbg bbn bbo bbr bbs bbu bby bca bcb bcc bcg bcn bco bcr bcs bcu bcy bga bgb bgc bgg bgn bgo bgr bgs bgu bna bnb bnc bng bnn bno bnr bns bnu boa bob boc bog bon boo bor bos bou boy bra brb brg brn bro brr brs bru bry bsa bsb bsc bsg bsn bso bsr bss bsu bsy bua bub buc bug bun buo bur bus buu buy by- bya byc byg byn byo byr bys byu c-- caa cab cac cag can cao car cas cau cay cba cbb cbc cbg cbn cbo cbr cbs cbu cby cca ccb ccc ccg ccn cco ccr ccs ccu cga cgb cgc cgg cgn cgo cgr cgs cgu cgy cn- cna cnb cnc cng cnn cno cnr cns cnu cny co- coa cob coc cog con coo cor cos cou coy cra crb crc crg crn cro crr crs cru cry csa csb csc csg csn cso csr css csu csy cua cub cuc cug cun cuo cur cus cuu cuy cya cyb cyc cyg cyn cyo cyr cys gaa gab gac gag gan gao gar gas gau gay gba gbc gbg gbn gbo gbr gbs gbu gby gca gcb gcc gcg gcn gco gcr gcs gcu gga ggb ggc ggg ggn ggo ggr ggs ggu gna gnb gnc gnn gno gnr gns gnu goa gob goc gog gon goo gor gos gou goy gra grb grc grg grn gro grr grs gru gry gsa gsb gsc gsg gsn gso gsr gss gsu gu- gua gub guc gug gun guo gur gus guu guy gy- gya gyb gyn gyo gyr gys naa nab nac nag nan nao nar nas nau nay nba nbb nbc nbg nbn nbo nbr nbs nbu nca ncb ncc ncg ncn nco ncr ncs ncu nga ngb ngc ngg ngn ngo ngs ngu nna nnb nnc nng nnn nno nns nnu no- noa nob noc nog non noo nor nos nou noy nra nrb nrc nrg nrn nro nrr nrs nru nry nsa nsb nsc nsg nsn nso nsr nss nsu nsy nua nub nuc nug nun nuo nur nus nuu nuy nya nyc nyg nyn nyo nys nyu nyy oaa oab oac oag oan oao oar oas oau ob- oba obb obc obg obn obo obr obs obu oby oc- oca ocb occ ocg ocn oco ocr ocs ocu oga ogc ogg ogn ogo ogs ogy on- ona onb onc ong onn ono onr ons onu ony oo- ooa oob ooc oog oon ooo oor oos or- ora orb orc org orn oro orr ors oru ory os- osa osb osc osg osn oso osr oss osu ou- oua ouc oun ouo our ous oya oyo oys ra- raa rab rac rag ran rao rar ras rau ray rba rbb rbc rbg rbn rbo rbr rbs rbu rca rcb rcc rcg rcn rco rcr rcs rcu rga rgb rgc rgg rgn rgo rgr rgs rna rnb rnc rng rnn rno rnr rns rnu rny roa rob roc rog ron roo ror ros rou roy rra rrb rrc rrg rrn rrr rrs rru rsa rsb rsc rsg rsn rso rsr rss rsu rua rub ruc rug run ruo rur rus ruu ruy ry- rya ryc ryg ryn ryo ryr rys ryu ryy saa sab sac sag san sao sar sas sau say sba sbb sbc sbg sbn sbo sbr sbs sbu sby sca scb scc scg scn sco scr scs scu sga sgb sgc sgg sgn sgo sgr sgs sgu sna snb snc sng snn sno snr sns snu sny soa sob soc sog son soo sor sos sou soy sr- sra srb src srg srn sro srr srs sry ss- ssa ssb ssc ssg ssn sso ssr sss ssu sua sub suc sug sun suo sur sus suu suy sy- sya syb syc syg syn syr sys syu ua- uaa uab uac uag uan uao uar uas uau uay uba ubb ubc ubg ubn ubo ubr ubs ubu uby uca ucb ucc ucg ucn uco ucr ucs ucu uga ugb ugc ugg ugn ugo ugr ugs ugu un- una unb unc ung unn uno unr uns unu uny uoa uob uoc uog uon uoo uor uos ur- ura urb urc urg urn uro urr urs uru ury usa usb usc usg usn uso usr uss usu uua uuc uug uun uur uus uuu uyc uyo uys uyu yaa yab yac yag yan yao yar yas yau yay ybc ybg ybr ybs yby yca ycc yco ycs ycu ycy yga ygc ygo yna yng ynn yns ynu yny yob yoc yog yon yoo yor yos you yoy yra yrc yrg yrn yro yrs yru ysa ysb ysc ysg yso ysr yss ysu ysy yua yug yun yuo yur yus yuu yuy yyb yyc yyg yys yyu yyy