-er a-a a-c a-t aaa aac aad aae aak aan aap aar aas aat ac- aca acc acd ace ack acn acp acr acs act ad- ada adc add ade adk adn adp adr ads adt aea aec aed aee aek aen aep aer aes aet aka akc akd ake akk akn akp akr aks an- ana anc and ane ank ann anp anr ans ant ap- apa apc apd ape apk apn app apr aps apt ar- ara arc ard are ark arn arp arr ars art as- asa asc asd ase ask asn asp asr ass ast at- ata atc atd ate atn atp atr ats att c-- caa cac cad cae cak can cap car cas cat cca ccc ccd cce cck ccn ccp ccr ccs cct cda cdc cdd cde cdk cdn cdp cdr cds cdt ce- cea cec ced cee cek cen cep cer ces cet cka ckc ckd cks ckt cn- cna cnc cnd cne cnn cnp cnr cns cnt cpa cpc cpd cpe cpk cpn cpp cpr cps cpt cra crc crd cre crk crn crp crr crs crt csa csc csd cse csk csn csp csr css cst cta ctc ctd cte ctk ctn ctp ctr cts ctt daa dac dad dae dak dan dap dar das dat dca dcc dcd dce dck dcn dcp dcr dcs dct dda ddc ddd dde ddk ddn ddp ddr dds ddt de- dea dec ded dee dek den dep der des det dka dkc dke dkk dkp dkr dks dkt dna dnc dnd dne dnk dnn dnp dnr dns dnt dpa dpc dpd dpe dpk dpn dpp dpr dps dpt dra drc drd dre drk drn drp drr drs drt dsa dsc dsd dse dsk dsn dsp dsr dss dst dta dtc dtd dte dtk dtn dtp dtr dts dtt eaa eac ead eae eak ean eap ear eas eat ec- eca ecc ecd ece eck ecn ecr ecs ect ed- eda edc edd ede edk edn edp edr eds edt eea eec eed eee eek een eep eer ees eet eka ekc ekd eke ekp ekr eks ekt en- ena enc end ene enk enn enp enr ens ent ep- epa epc epd epe epn epp epr eps ept era erc erd ere erk ern erp err ers ert es- esa esc esd ese esk esn esp esr ess est eta etc etd ete etk etn etp etr ets ett k-t ka- kaa kac kad kae kak kan kap kar kas kat kca kcc kcd kce kck kcn kcp kcr kcs kct kda kdc kde kdk kdp kdr kds kdt ke- kea kec ked kee kek ken kep ker kes ket kkc kke kkk kkn kkp kkr kks kkt kn- kna knc knd kne knk knn knp knr knt kpa kpc kpd kpe kpk kpn kpp kpr kps kpt kra krc krd krk krn krp krr krs krt ksa ksc ksd kse ksk ksn ksp ksr kss kst kta ktc kte ktk ktn ktp ktr kts ktt naa nac nad nae nak nan nap nar nas nat nca ncc ncd nce nck ncn ncp ncr ncs nct nda ndc ndd nde ndk ndn ndp ndr nds ndt ne- nea nec ned nee nek nen nep ner nes net nka nkc nke nkk nkn nkp nkr nks nkt nna nnc nne nnk nnn nnp nns nnt npa npc npd npe npn npp npr nps npt nra nrc nrd nre nrk nrn nrp nrr nrs nrt nsa nsc nsd nse nsk nsn nsp nsr nss nst nta ntc ntd nte ntk ntn ntp ntr nts ntt p-p paa pac pad pae pak pan pap par pas pat pca pcc pcd pce pck pcn pcp pcr pcs pct pda pdc pdd pde pdk pdn pdp pdr pds pdt pea pec ped pee pek pen pep per pes pet pka pkc pkd pke pkn pkp pkr pks pkt pn- pna pnc pnd pne pnk pnn pnp pnr pns pnt ppa ppc ppd ppe ppk ppn ppp ppr pps ppt pra prc prd pre prk prn prp prr prs prt ps- psa psc psd pse psk psn psp psr pss pst pt- pta ptc ptd pte ptk ptn ptp ptr pts ptt ra- raa rac rad rae rak ran rap rar ras rat rca rcc rcd rce rcn rcp rcr rcs rct rda rdc rdd rde rdn rdp rdr rds rdt re- rea rec red ree rek ren rep rer res ret rkc rke rkk rkp rks rkt rna rnc rnd rnn rnp rnr rns rnt rpa rpc rpd rpe rpk rpn rpp rpr rps rpt rra rrc rrd rrk rrn rrp rrr rrs rrt rsa rsc rsd rse rsk rsn rsp rsr rss rst rta rtc rtd rte rtk rtn rtp rtr rts rtt saa sac sad sae sak san sap sar sas sat sca scc scd sce sck scn scp scr scs sct sda sdc sdd sde sdk sdn sdp sdr sds sdt se- sea sec sed see sek sen sep ser ses set sk- ska skc skd ske skk skp skr sks skt sna snc snd sne snk snn snp snr sns snt spa spc spd spe spk spn spp spr sps spt sr- sra src srd sre srk srn srp srr srs srt ss- ssa ssc ssd sse ssk ssn ssp ssr sss sst sta stc std ste stk stn stp str sts stt taa tac tad tae tak tan tap tar tas tat tca tcc tcd tce tck tcn tcp tcr tcs tct tda tdc tdd tde tdk tdn tdp tdr tds tdt te- tea tec ted tee tek ten tep ter tes tet tka tkc tke tkk tkp tkr tks tkt tna tnc tnd tne tnk tnn tnp tnr tns tnt tpa tpc tpd tpe tpk tpn tpp tpr tps tpt tra trc trd tre trk trn trp trr trs trt tsa tsc tsd tse tsk tsn tsp tsr tss tst tta ttc ttd tte ttk ttn ttp ttr tts ttt