a-a a-c aaa aac aad aaf aan aao aap aar ac- aca acc acd acf acn aco acp acr ad- ada adc add adf adn ado adp adr af- afa afc afd aff afn afo afp afr an- ana anc and anf ann ano anp anr aoa aoc aod aof aon aoo aop aor ap- apa apc apd apf apn apo app apr ar- ara arc ard arf arn aro arp arr c-- caa cac cad caf can cao cap car cca ccc ccd ccf ccn cco ccp ccr cda cdc cdd cdf cdn cdo cdp cdr cfa cfc cfd cff cfn cfo cfp cfr cn- cna cnc cnd cnf cnn cno cnp cnr co- coa coc cod cof con coo cop cor cpa cpc cpd cpf cpn cpo cpp cpr cra crc crd crf crn cro crp crr daa dac dad daf dan dao dap dar dca dcc dcd dcf dcn dco dcp dcr dda ddc ddd ddf ddn ddo ddp ddr dfa dfc dfd dff dfn dfo dfp dfr dna dnc dnd dnf dnn dno dnp dnr doa doc dod dof don doo dop dor dpa dpc dpd dpf dpn dpo dpp dpr dra drc drd drn dro drp drr faa fac fad faf fan fao fap far fca fcc fcd fcf fcn fco fcp fcr fda fdc fdd fdf fdn fdo fdp fdr ffa ffc ffd fff ffn ffo ffp ffr fna fnc fnd fnf fnn fnp fnr foa foc fof fon foo fop for fpa fpc fpd fpn fpo fpp fpr fra frc frd frf frn fro frp frr naa nac nad naf nan nao nap nar nca ncc ncd ncf ncn nco ncp ncr nda ndc ndd ndf ndn ndo ndp ndr nfa nfc nfd nff nfn nfo nfp nfr nna nnc nnf nnn nno nnp no- noa noc nod nof non noo nop nor npa npc npd npf npn npo npp npr nra nrc nrd nrf nrn nro nrp nrr oaa oac oad oaf oan oao oap oar oc- oca occ ocd ocf ocn oco ocp ocr oda odc odd odf odn odo odp odr of- ofa ofc ofd off ofn ofo ofp ofr on- ona onc ond onf onn ono onp onr oo- ooa ooc ood oof oon ooo oop oor op- opa opc opd opf opn opo opp opr or- ora orc ord orf orn oro orp orr p-p paa pac pad paf pan pao pap par pca pcc pcd pcf pcn pco pcp pcr pda pdc pdd pdf pdn pdo pdp pdr pfa pfc pfd pff pfn pfo pfp pfr pn- pna pnc pnd pnf pnn pno pnp pnr poa poc pod pof pon poo pop por ppa ppc ppd ppf ppn ppo ppp ppr pra prc prd prf prn pro prp prr ra- raa rac rad raf ran rao rap rar rca rcc rcd rcf rcn rco rcp rcr rda rdc rdd rdf rdn rdo rdp rdr rfa rfc rfd rff rfn rfo rfp rfr rna rnc rnd rnn rno rnp rnr roa roc rod rof ron roo rop ror rpa rpc rpd rpf rpn rpo rpp rpr rra rrc rrd rrf rrn rrp rrr