-er a-a a-c a-t aaa aac aae aam aan aap aar aat ac- aca acc ace acm acn acp acr act aea aec aee aem aen aep aer aet ama amc ame amm amn amp amr amt an- ana anc ane anm ann anp anr ant ap- apa apc ape apm apn app apr apt ar- ara arc are arm arn arp arr art at- ata atc ate atm atn atp atr att c-- caa cac cae cam can cap car cat cca ccc cce ccm ccn ccp ccr cct ce- cea cec cee cem cen cep cer cet cma cmc cme cmm cmn cmp cmr cmt cn- cna cnc cne cnm cnn cnp cnr cnt cpa cpc cpe cpm cpn cpp cpr cpt cra crc cre crm crn crp crr crt cta ctc cte ctm ctn ctp ctr ctt eaa eac eae eam ean eap ear eat ec- eca ecc ece ecm ecn ecr ect eea eec eee eem een eep eer eet em- ema emc eme emm emn emp emr emt en- ena enc ene enm enn enp enr ent ep- epa epc epe epm epn epp epr ept era erc ere erm ern erp err ert eta etc ete etm etn etp etr ett m-r maa mac mae mam man map mar mat mc- mca mcc mce mcm mcn mcp mcr mct mea mec mee mem men mep mer met mma mmc mme mmm mmn mmp mmr mmt mna mnc mne mnm mnn mnp mnr mnt mpa mpc mpe mpm mpn mpp mpr mpt mra mrc mre mrm mrn mrp mrr mrt mta mtc mte mtm mtn mtp mtr mtt naa nac nae nam nan nap nar nat nca ncc nce ncm ncn ncp ncr nct ne- nea nec nee nem nen nep ner net nma nmc nme nmm nmn nmp nmr nmt nna nnc nne nnm nnn nnp nnt npa npc npe npm npn npp npr npt nra nrc nre nrm nrn nrp nrr nrt nta ntc nte ntm ntn ntp ntr ntt p-p paa pac pae pam pan pap par pat pca pcc pce pcm pcn pcp pcr pct pea pec pee pem pen pep per pet pma pmc pme pmm pmn pmp pmr pmt pn- pna pnc pne pnm pnn pnp pnr pnt ppa ppc ppe ppm ppn ppp ppr ppt pra prc pre prm prn prp prr prt pt- pta ptc pte ptm ptn ptp ptr ptt ra- raa rac rae ram ran rap rar rat rca rcc rce rcm rcn rcp rcr rct re- rea rec ree rem ren rep rer ret rma rmc rme rmm rmn rmp rmr rmt rna rnc rnm rnn rnp rnr rnt rpa rpc rpe rpm rpn rpp rpr rpt rra rrc rrm rrn rrp rrr rrt rta rtc rte rtm rtn rtp rtr rtt taa tac tae tam tan tap tar tat tca tcc tce tcm tcn tcp tcr tct te- tea tec tee tem ten tep ter tet tma tmc tme tmm tmn tmp tmr tmt tna tnc tne tnm tnn tnp tnr tnt tpa tpc tpe tpm tpn tpp tpr tpt tra trc tre trm trn trp trr trt tta ttc tte ttm ttn ttp ttr ttt