-er a-a a-c a-t aaa aac aae aaf aan aap aar aat ac- aca acc ace acf acn acp acr act aea aec aee aef aen aep aer aet af- afa afc afe aff afn afp afr aft an- ana anc ane anf ann anp anr ant ap- apa apc ape apf apn app apr apt ar- ara arc are arf arn arp arr art at- ata atc ate atf atn atp atr att c-- caa cac cae caf can cap car cat cca ccc cce ccf ccn ccp ccr cct ce- cea cec cee cef cen cep cer cet cfa cfc cfe cff cfn cfp cfr cft cn- cna cnc cne cnf cnn cnp cnr cnt cpa cpc cpe cpf cpn cpp cpr cpt cra crc cre crf crn crp crr crt cta ctc cte ctf ctn ctp ctr ctt eaa eac eae eaf ean eap ear eat ec- eca ecc ece ecf ecn ecr ect eea eec eee eef een eep eer eet ef- efa efc efe eff efp efr eft en- ena enc ene enf enn enp enr ent ep- epa epc epe epf epn epp epr ept era erc ere erf ern erp err ert eta etc ete etf etn etp etr ett faa fac fae faf fan fap far fat fca fcc fce fcf fcn fcp fcr fct fea fec fee fef fen fep fer fet ffa ffc ffe fff ffn ffp ffr fft fna fnc fne fnf fnn fnp fnr fnt fpa fpc fpe fpn fpp fpr fpt fra frc fre frf frn frp frr frt fta ftc fte ftf ftn ftp ftr ftt naa nac nae naf nan nap nar nat nca ncc nce ncf ncn ncp ncr nct ne- nea nec nee nef nen nep ner net nfa nfc nfe nff nfn nfp nfr nft nna nnc nne nnf nnn nnp nnt npa npc npe npf npn npp npr npt nra nrc nre nrf nrn nrp nrr nrt nta ntc nte ntf ntn ntp ntr ntt p-p paa pac pae paf pan pap par pat pca pcc pce pcf pcn pcp pcr pct pea pec pee pef pen pep per pet pfa pfc pfe pff pfn pfp pfr pft pn- pna pnc pne pnf pnn pnp pnr pnt ppa ppc ppe ppf ppn ppp ppr ppt pra prc pre prf prn prp prr prt pt- pta ptc pte ptf ptn ptp ptr ptt ra- raa rac rae raf ran rap rar rat rca rcc rce rcf rcn rcp rcr rct re- rea rec ree ref ren rep rer ret rfa rfc rfe rff rfn rfp rfr rft rna rnc rnn rnp rnr rnt rpa rpc rpe rpf rpn rpp rpr rpt rra rrc rrf rrn rrp rrr rrt rta rtc rte rtf rtn rtp rtr rtt taa tac tae taf tan tap tar tat tca tcc tce tcf tcn tcp tcr tct te- tea tec tee tef ten tep ter tet tfa tfc tfe tff tfn tfp tfr tft tna tnc tne tnf tnn tnp tnr tnt tpa tpc tpe tpf tpn tpp tpr tpt tra trc tre trf trn trp trr trt tta ttc tte ttf ttn ttp ttr ttt