-er a-a a-c aaa aac aad aae aan aao aap aar ac- aca acc acd ace acn aco acp acr ad- ada adc add ade adn ado adp adr aea aec aed aee aen aeo aep aer an- ana anc and ane ann ano anp anr aoa aoc aod aoe aon aoo aop aor ap- apa apc apd ape apn apo app apr ar- ara arc ard are arn aro arp arr c-- caa cac cad cae can cao cap car cca ccc ccd cce ccn cco ccp ccr cda cdc cdd cde cdn cdo cdp cdr ce- cea cec ced cee cen ceo cep cer cn- cna cnc cnd cne cnn cno cnp cnr co- coa coc cod coe con coo cop cor cpa cpc cpd cpe cpn cpo cpp cpr cra crc crd cre crn cro crp crr daa dac dad dae dan dao dap dar dca dcc dcd dce dcn dco dcp dcr dda ddc ddd dde ddn ddo ddp ddr de- dea dec ded dee den deo dep der dna dnc dnd dne dnn dno dnp dnr doa doc dod doe don doo dop dor dpa dpc dpd dpe dpn dpo dpp dpr dra drc drd dre drn dro drp drr eaa eac ead eae ean eao eap ear ec- eca ecc ecd ece ecn eco ecr ed- eda edc edd ede edn edo edp edr eea eec eed eee een eeo eep eer en- ena enc end ene enn eno enp enr eo- eoa eoc eod eoe eon eoo eop eor ep- epa epc epd epe epn epo epp epr era erc erd ere ern ero erp err naa nac nad nae nan nao nap nar nca ncc ncd nce ncn nco ncp ncr nda ndc ndd nde ndn ndo ndp ndr ne- nea nec ned nee nen neo nep ner nna nnc nne nnn nno nnp no- noa noc nod noe non noo nop nor npa npc npd npe npn npo npp npr nra nrc nrd nre nrn nro nrp nrr oaa oac oad oae oan oao oap oar oc- oca occ ocd ocn oco ocp ocr oda odc odd ode odn odo odp odr oea oec oed oee oen oeo oep oer on- ona onc ond one onn ono onp onr oo- ooa ooc ood oon ooo oop oor op- opa opc opd ope opn opo opp opr or- ora orc ord ore orn oro orp orr p-p paa pac pad pae pan pao pap par pca pcc pcd pce pcn pco pcp pcr pda pdc pdd pde pdn pdo pdp pdr pea pec ped pee pen peo pep per pn- pna pnc pnd pne pnn pno pnp pnr poa poc pod poe pon poo pop por ppa ppc ppd ppe ppn ppo ppp ppr pra prc prd pre prn pro prp prr ra- raa rac rad rae ran rao rap rar rca rcc rcd rce rcn rco rcp rcr rda rdc rdd rde rdn rdo rdp rdr re- rea rec red ree ren reo rep rer rna rnc rnd rnn rno rnp rnr roa roc rod roe ron roo rop ror rpa rpc rpd rpe rpn rpo rpp rpr rra rrc rrd rrn rrp rrr