a-a a-b a-c a-t aaa aab aac aad aan aao aap aar aas aat ab- aba abb abc abd abn abo abp abr abs abt ac- aca acb acc acd acn aco acp acr acs act ad- ada adb adc add adn ado adp adr ads adt an- ana anb anc and ann ano anp anr ans ant aoa aob aoc aod aon aoo aop aor aos aot ap- apa apb apc apd apn apo app apr aps apt ar- ara arb arc ard arn aro arp arr ars art as- asa asb asc asd asn aso asp asr ass ast at- ata atb atc atd atn ato atp atr ats att b-p baa bab bac bad ban bao bap bar bas bat bba bbb bbc bbd bbn bbo bbp bbr bbs bbt bca bcb bcc bcd bcn bco bcp bcr bcs bct bda bdb bdc bdd bdo bdp bdr bds bdt bna bnb bnc bnd bnn bno bnp bnr bns bnt boa bob boc bod bon boo bop bor bos bot bpa bpb bpc bpd bpn bpo bpp bpr bps bpt bra brb brd brn bro brp brr brs brt bsa bsb bsc bsd bsn bso bsp bsr bss bst bta btb btc btd btn bto btp btr bts btt c-- caa cab cac cad can cao cap car cas cat cba cbb cbc cbd cbn cbo cbp cbr cbs cbt cca ccb ccc ccd ccn cco ccp ccr ccs cct cda cdb cdc cdd cdn cdo cdp cdr cds cdt cn- cna cnb cnc cnd cnn cno cnp cnr cns cnt co- coa cob coc cod con coo cop cor cos cot cpa cpb cpc cpd cpn cpo cpp cpr cps cpt cra crb crc crd crn cro crp crr crs crt csa csb csc csd csn cso csp csr css cst cta ctb ctc ctd ctn cto ctp ctr cts ctt daa dab dac dad dan dao dap dar das dat dba dbb dbc dbd dbn dbo dbp dbr dbs dbt dca dcb dcc dcd dcn dco dcp dcr dcs dct dda ddb ddc ddd ddn ddo ddp ddr dds ddt dna dnb dnc dnd dnn dno dnp dnr dns dnt doa dob doc dod don doo dop dor dos dot dpa dpb dpc dpd dpn dpo dpp dpr dps dpt dra drb drc drd drn dro drp drr drs drt dsa dsb dsc dsd dsn dso dsp dsr dss dst dta dtb dtc dtd dtn dto dtp dtr dts dtt naa nab nac nad nan nao nap nar nas nat nba nbb nbc nbd nbn nbo nbp nbr nbs nbt nca ncb ncc ncd ncn nco ncp ncr ncs nct nda ndb ndc ndd ndn ndo ndp ndr nds ndt nna nnb nnc nnn nno nnp nns nnt no- noa nob noc nod non noo nop nor nos not npa npb npc npd npn npo npp npr nps npt nra nrb nrc nrd nrn nro nrp nrr nrs nrt nsa nsb nsc nsd nsn nso nsp nsr nss nst nta ntb ntc ntd ntn nto ntp ntr nts ntt oaa oab oac oad oan oao oap oar oas oat ob- oba obb obc obd obn obo obp obr obs obt oc- oca ocb occ ocd ocn oco ocp ocr ocs oct oda odb odc odd odn odo odp odr ods odt on- ona onb onc ond onn ono onp onr ons ont oo- ooa oob ooc ood oon ooo oop oor oos oot op- opa opb opc opd opn opo opp opr ops opt or- ora orb orc ord orn oro orp orr ors ort os- osa osb osc osd osn oso osp osr oss ost ot- ota otb otc otd otn oto otp otr ots ott p-p paa pab pac pad pan pao pap par pas pat pba pbb pbc pbd pbn pbo pbp pbr pbs pbt pca pcb pcc pcd pcn pco pcp pcr pcs pct pda pdb pdc pdd pdn pdo pdp pdr pds pdt pn- pna pnb pnc pnd pnn pno pnp pnr pns pnt poa pob poc pod pon poo pop por pos pot ppa ppb ppc ppd ppn ppo ppp ppr pps ppt pra prb prc prd prn pro prp prr prs prt ps- psa psb psc psd psn pso psp psr pss pst pt- pta ptb ptc ptd ptn pto ptp ptr pts ptt ra- raa rab rac rad ran rao rap rar ras rat rba rbb rbc rbd rbn rbo rbp rbr rbs rbt rca rcb rcc rcd rcn rco rcp rcr rcs rct rda rdb rdc rdd rdn rdo rdp rdr rds rdt rna rnb rnc rnd rnn rno rnp rnr rns rnt roa rob roc rod ron roo rop ror ros rot rpa rpb rpc rpd rpn rpo rpp rpr rps rpt rra rrb rrc rrd rrn rrp rrr rrs rrt rsa rsb rsc rsd rsn rso rsp rsr rss rst rta rtb rtc rtd rtn rto rtp rtr rts rtt saa sab sac sad san sao sap sar sas sat sba sbb sbc sbd sbn sbo sbp sbr sbs sbt sca scb scc scd scn sco scp scr scs sct sda sdb sdc sdd sdn sdo sdp sdr sds sdt sna snb snc snd snn sno snp snr sns snt soa sob soc sod son soo sop sor sos sot spa spb spc spd spn spo spp spr sps spt sr- sra srb src srd srn sro srp srr srs srt ss- ssa ssb ssc ssd ssn sso ssp ssr sss sst sta stb stc std stn sto stp str sts stt taa tab tac tad tan tao tap tar tas tat tba tbb tbc tbd tbn tbo tbp tbr tbs tbt tca tcb tcc tcd tcn tco tcp tcr tcs tct tda tdb tdc tdd tdn tdo tdp tdr tds tdt tna tnb tnc tnd tnn tno tnp tnr tns tnt to- toa tob toc tod ton too top tor tos tot tpa tpb tpc tpd tpn tpo tpp tpr tps tpt tra trb