a-a a-b a-c a-t aaa aab aac aan aao aap aar aat aay ab- aba abb abc abn abo abp abr abt aby ac- aca acb acc acn aco acp acr act acy an- ana anb anc ann ano anp anr ant any aoa aob aoc aon aoo aop aor aot ap- apa apb apc apn apo app apr apt apy ar- ara arb arc arn aro arp arr art ary at- ata atb atc atn ato atp atr att ay- aya ayc ayn ayo ayp ayr ayt b-p baa bab bac ban bao bap bar bat bay bba bbb bbc bbn bbo bbp bbr bbt bby bca bcb bcc bcn bco bcp bcr bct bcy bna bnb bnc bnn bno bnp bnr bnt boa bob boc bon boo bop bor bot boy bpa bpb bpc bpn bpo bpp bpr bpt bpy bra brb brn bro brp brr brt bry bta btb btc btn bto btp btr btt bty by- bya byc byn byo byp byr byt c-- caa cab cac can cao cap car cat cay cba cbb cbc cbn cbo cbp cbr cbt cby cca ccb ccc ccn cco ccp ccr cct cn- cna cnb cnc cnn cno cnp cnr cnt cny co- coa cob coc con coo cop cor cot coy cpa cpb cpc cpn cpo cpp cpr cpt cra crb crc crn cro crp crr crt cry cta ctb ctc ctn cto ctp ctr ctt cty cya cyb cyc cyn cyo cyp cyr cyt naa nab nac nan nao nap nar nat nay nba nbb nbc nbn nbo nbp nbr nbt nca ncb ncc ncn nco ncp ncr nct nna nnb nnc nnn nno nnp nnt no- noa nob noc non noo nop nor not noy npa npb npc npn npo npp npr npt nra nrb nrc nrn nro nrp nrr nrt nry nta ntb ntc ntn nto ntp ntr ntt nya nyc nyn nyo nyp nyt nyy oaa oab oac oan oao oap oar oat ob- oba obb obc obn obo obp obr obt oby oc- oca ocb occ ocn oco ocp ocr oct on- ona onb onc onn ono onp onr ont ony oo- ooa oob ooc oon ooo oop oor oot op- opa opb opc opn opo opp opr opt opy or- ora orb orc orn oro orp orr ort ory ot- ota otb otc otn oto otp otr ott oya oyo p-p paa pab pac pan pao pap par pat pay pba pbb pbc pbn pbo pbp pbr pbt pby pca pcb pcc pcn pco pcp pcr pct pn- pna pnb pnc pnn pno pnp pnr pnt pny poa pob poc pon poo pop por pot poy ppa ppb ppc ppn ppo ppp ppr ppt pra prb prc prn pro prp prr prt pry pt- pta ptb ptc ptn pto ptp ptr ptt pty py- pya pyb pyc pyn pyo pyr pyt ra- raa rab rac ran rao rap rar rat ray rba rbb rbc rbn rbo rbp rbr rbt rca rcb rcc rcn rco rcp rcr rct rna rnb rnc rnn rno rnp rnr rnt rny roa rob roc ron roo rop ror rot roy rpa rpb rpc rpn rpo rpp rpr rpt rra rrb rrc rrn rrp rrr rrt rta rtb rtc rtn rto rtp rtr rtt rty ry- rya ryc ryn ryo ryr ryy taa tab tac tan tao tap tar tat tay tba tbb tbc tbn tbo tbp tbr tbt tca tcb tcc tcn tco tcp tcr tct tna tnb tnc tnn tno tnp tnr tnt to- toa tob toc ton too top tor tot toy tpa tpb tpc tpn tpo tpp tpr tpt tra trb trc trn tro trp trr trt try tta ttb ttc ttn tto ttp ttr ttt tty tya tyc tyn tyo typ tyr tyt yaa yab yac yan yao yap yar yat yay ybc ybp ybr yby yca ycc yco ycp ycy yna ynn ynp yny yob yoc yon yoo yop yor yot yoy ypa ypo yra yrc yrn yro yrp yrt yta ytc ytn yto ytp ytr ytt yyb yyc yyt yyy