-er a-a a-c a-t aaa aac aad aae aan aap aar aat ac- aca acc acd ace acn acp acr act ad- ada adc add ade adn adp adr adt aea aec aed aee aen aep aer aet an- ana anc and ane ann anp anr ant ap- apa apc apd ape apn app apr apt ar- ara arc ard are arn arp arr art at- ata atc atd ate atn atp atr att c-- caa cac cad cae can cap car cat cca ccc ccd cce ccn ccp ccr cct cda cdc cdd cde cdn cdp cdr cdt ce- cea cec ced cee cen cep cer cet cn- cna cnc cnd cne cnn cnp cnr cnt cpa cpc cpd cpe cpn cpp cpr cpt cra crc crd cre crn crp crr crt cta ctc ctd cte ctn ctp ctr ctt daa dac dad dae dan dap dar dat dca dcc dcd dce dcn dcp dcr dct dda ddc ddd dde ddn ddp ddr ddt de- dea dec ded dee den dep der det dna dnc dnd dne dnn dnp dnr dnt dpa dpc dpd dpe dpn dpp dpr dpt dra drc drd dre drn drp drr drt dta dtc dtd dte dtn dtp dtr dtt eaa eac ead eae ean eap ear eat ec- eca ecc ecd ece ecn ecr ect ed- eda edc edd ede edn edp edr edt eea eec eed eee een eep eer eet en- ena enc end ene enn enp enr ent ep- epa epc epd epe epn epp epr ept era erc erd ere ern erp err ert eta etc etd ete etn etp etr ett naa nac nad nae nan nap nar nat nca ncc ncd nce ncn ncp ncr nct nda ndc ndd nde ndn ndp ndr ndt ne- nea nec ned nee nen nep ner net nna nnc nne nnn nnp nnt npa npc npd npe npn npp npr npt nra nrc nrd nre nrn nrp nrr nrt nta ntc ntd nte ntn ntp ntr ntt p-p paa pac pad pae pan pap par pat pca pcc pcd pce pcn pcp pcr pct pda pdc pdd pde pdn pdp pdr pdt pea pec ped pee pen pep per pet pn- pna pnc pnd pne pnn pnp pnr pnt ppa ppc ppd ppe ppn ppp ppr ppt pra prc prd pre prn prp prr prt pt- pta ptc ptd pte ptn ptp ptr ptt ra- raa rac rad rae ran rap rar rat rca rcc rcd rce rcn rcp rcr rct rda rdc rdd rde rdn rdp rdr rdt re- rea rec red ree ren rep rer ret rna rnc rnd rnn rnp rnr rnt rpa rpc rpd rpe rpn rpp rpr rpt rra rrc rrd rrn rrp rrr rrt rta rtc rtd rte rtn rtp rtr rtt taa tac tad tae tan tap tar tat tca tcc tcd tce tcn tcp tcr tct tda tdc tdd tde tdn tdp tdr tdt te- tea tec ted tee ten tep ter tet tna tnc tnd tne tnn tnp tnr tnt tpa tpc tpd tpe tpn tpp tpr tpt tra trc trd tre trn trp trr trt tta ttc ttd tte ttn ttp ttr ttt