-er a-a a-c a-t aaa aac aae aam aan aap aar aas aat ac- aca acc ace acm acn acp acr acs act aea aec aee aem aen aep aer aes aet ama amc ame amm amn amp amr ams amt an- ana anc ane anm ann anp anr ans ant ap- apa apc ape apm apn app apr aps apt ar- ara arc are arm arn arp arr ars art as- asa asc ase asm asn asp asr ass ast at- ata atc ate atm atn atp atr ats att c-- caa cac cae cam can cap car cas cat cca ccc cce ccm ccn ccp ccr ccs cct ce- cea cec cee cem cen cep cer ces cet cma cmc cme cmm cmn cmp cmr cms cmt cn- cna cnc cne cnm cnn cnp cnr cns cnt cpa cpc cpe cpm cpn cpp cpr cps cpt cra crc cre crm crn crp crr crs crt csa csc cse csm csn csp csr css cst cta ctc cte ctm ctn ctp ctr cts ctt eaa eac eae eam ean eap ear eas eat ec- eca ecc ece ecm ecn ecr ecs ect eea eec eee eem een eep eer ees eet em- ema emc eme emm emn emp emr ems emt en- ena enc ene enm enn enp enr ens ent ep- epa epc epe epm epn epp epr eps ept era erc ere erm ern erp err ers ert es- esa esc ese esm esn esp esr ess est eta etc ete etm etn etp etr ets ett m-r maa mac mae mam man map mar mas mat mc- mca mcc mce mcm mcn mcp mcr mcs mct mea mec mee mem men mep mer mes met mma mmc mme mmm mmn mmp mmr mms mmt mna mnc mne mnm mnn mnp mnr mns mnt mpa mpc mpe mpm mpn mpp mpr mps mpt mra mrc mre mrm mrn mrp mrr mrs mrt msa msc mse msm msn msp msr mss mst mta mtc mte mtm mtn mtp mtr mts mtt naa nac nae nam nan nap nar nas nat nca ncc nce ncm ncn ncp ncr ncs nct ne- nea nec nee nem nen nep ner nes net nma nmc nme nmm nmn nmp nmr nms nmt nna nnc nne nnm nnn nnp nns nnt npa npc npe npm npn npp npr nps npt nra nrc nre nrm nrn nrp nrr nrs nrt nsa nsc nse nsm nsn nsp nsr nss nst nta ntc nte ntm ntn ntp ntr nts ntt p-p paa pac pae pam pan pap par pas pat pca pcc pce pcm pcn pcp pcr pcs pct pea pec pee pem pen pep per pes pet pma pmc pme pmm pmn pmp pmr pms pmt pn- pna pnc pne pnm pnn pnp pnr pns pnt ppa ppc ppe ppm ppn ppp ppr pps ppt pra prc pre prm prn prp prr prs prt ps- psa psc pse psm psn psp psr pss pst pt- pta ptc pte ptm ptn ptp ptr pts ptt ra- raa rac rae ram ran rap rar ras rat rca rcc rce rcm rcn rcp rcr rcs rct re- rea rec ree rem ren rep rer res ret rma rmc rme rmm rmn rmp rmr rms rmt rna rnc rnm rnn rnp rnr rns rnt rpa rpc rpe rpm rpn rpp rpr rps rpt rra rrc rrm rrn rrp rrr rrs rrt rsa rsc rse rsm rsn rsp rsr rss rst rta rtc rte rtm rtn rtp rtr rts rtt saa sac sae sam san sap sar sas sat sca scc sce scm scn scp scr scs sct se- sea sec see sem sen sep ser ses set sma smc sme smm smn smp smr sms smt sna snc sne snm snn snp snr sns snt spa spc spe spm spn spp spr sps spt sr- sra src sre srm srn srp srr srs srt ss- ssa ssc sse ssm ssn ssp ssr sss sst sta stc ste stm stn stp str sts stt taa tac tae tam tan tap tar tas tat tca tcc tce tcm tcn tcp tcr tcs tct te- tea tec tee tem ten tep ter tes tet tma tmc tme tmm tmn tmp tmr tms tmt tna tnc tne tnm tnn tnp tnr tns tnt tpa tpc tpe tpm tpn tpp tpr tps tpt tra trc tre trm trn trp trr trs trt tsa tsc tse tsm tsn tsp tsr tss tst tta ttc tte ttm ttn ttp ttr tts ttt