a-a a-b a-c aaa aab aac aag aak aan aar aas aay ab- aba abb abc abg abk abn abr abs aby ac- aca acb acc acg ack acn acr acs acy ag- aga agb agc agg agk agn agr ags agy aka akb akc akg akk akn akr aks an- ana anb anc ang ank ann anr ans any ar- ara arb arc arg ark arn arr ars ary as- asa asb asc asg ask asn asr ass asy ay- aya ayc ayk ayn ayr ays baa bab bac bag bak ban bar bas bay bba bbb bbc bbg bbk bbn bbr bbs bby bca bcb bcc bcg bck bcn bcr bcs bcy bga bgb bgc bgg bgk bgn bgr bgs bka bkb bkc bkg bkk bkn bkr bks bna bnb bnc bng bnk bnn bnr bns bra brb brg brk brn brr brs bry bsa bsb bsc bsg bsk bsn bsr bss bsy by- bya byc byg byk byn byr bys c-- caa cab cac cag cak can car cas cay cba cbb cbc cbg cbk cbn cbr cbs cby cca ccb ccc ccg cck ccn ccr ccs cga cgb cgc cgg cgn cgr cgs cgy cka ckb ckc cks cky cn- cna cnb cnc cng cnn cnr cns cny cra crb crc crg crk crn crr crs cry csa csb csc csg csk csn csr css csy cya cyb cyc cyg cyk cyn cyr cys gaa gab gac gag gak gan gar gas gay gba gbc gbg gbk gbn gbr gbs gby gca gcb gcc gcg gck gcn gcr gcs gga ggb ggc ggg ggn ggr ggs gka gkb gkn gks gna gnb gnc gnn gnr gns gra grb grc grg grk grn grr grs gry gsa gsb gsc gsg gsk gsn gsr gss gy- gya gyb gyn gyr gys ka- kaa kab kac kag kak kan kar kas kay kba kbb kbc kbk kbn kbr kbs kca kcb kcc kcg kck kcn kcr kcs kga kgb kgc kgs kgy kkb kkc kkk kkn kkr kks kky kn- kna knc kng knk knn knr kra krc krg krk krn krr krs kry ksa ksb ksc ksg ksk ksn ksr kss kya kyc kyn kyr kys naa nab nac nag nak nan nar nas nay nba nbb nbc nbg nbk nbn nbr nbs nca ncb ncc ncg nck ncn ncr ncs nga ngb ngc ngg ngk ngn ngs nka nkc nkk nkn nkr nks nky nna nnb nnc nng nnk nnn nns nra nrb nrc nrg nrk nrn nrr nrs nry nsa nsb nsc nsg nsk nsn nsr nss nsy nya nyc nyg nyk nyn nys nyy ra- raa rab rac rag rak ran rar ras ray rba rbb rbc rbg rbk rbn rbr rbs rca rcb rcc rcg rcn rcr rcs rga rgb rgc rgg rgk rgn rgr rgs rkb rkc rkg rkk rks rky rna rnb rnc rng rnn rnr rns rny rra rrb rrc rrg rrk rrn rrr rrs rsa rsb rsc rsg rsk rsn rsr rss ry- rya ryc ryg ryk ryn ryr rys ryy saa sab sac sag sak san sar sas say sba sbb sbc sbg sbk sbn sbr sbs sby sca scb scc scg sck scn scr scs sga sgb sgc sgg sgk sgn sgr sgs sk- ska skb skc skg skk skr sks sky sna snb snc sng snk snn snr sns sny sr- sra srb src srg srk srn srr srs sry ss- ssa ssb ssc ssg ssk ssn ssr sss sy- sya syb syc syg syk syn syr sys yaa yab yac yag yak yan yar yas yay ybc ybg ybr ybs yby yca ycc ycs ycy yga ygc yka ykk ykn yna yng ynk ynn yns yny yra yrc yrg yrn yrs ysa ysb ysc ysg ysk ysr yss ysy yyb yyc yyg yys yyy