-er a-a a-c a-t aaa aac aae aaf aan aao aap aar aat ac- aca acc ace acf acn aco acp acr act aea aec aee aef aen aeo aep aer aet af- afa afc afe aff afn afo afp afr aft an- ana anc ane anf ann ano anp anr ant aoa aoc aoe aof aon aoo aop aor aot ap- apa apc ape apf apn apo app apr apt ar- ara arc are arf arn aro arp arr art at- ata atc ate atf atn ato atp atr att c-- caa cac cae caf can cao cap car cat cca ccc cce ccf ccn cco ccp ccr cct ce- cea cec cee cef cen ceo cep cer cet cfa cfc cfe cff cfn cfo cfp cfr cft cn- cna cnc cne cnf cnn cno cnp cnr cnt co- coa coc coe cof con coo cop cor cot cpa cpc cpe cpf cpn cpo cpp cpr cpt cra crc cre crf crn cro crp crr crt cta ctc cte ctf ctn cto ctp ctr ctt eaa eac eae eaf ean eao eap ear eat ec- eca ecc ece ecf ecn eco ecr ect eea eec eee eef een eeo eep eer eet ef- efa efc efe eff efo efp efr eft en- ena enc ene enf enn eno enp enr ent eo- eoa eoc eoe eof eon eoo eop eor eot ep- epa epc epe epf epn epo epp epr ept era erc ere erf ern ero erp err ert eta etc ete etf etn eto etp etr ett faa fac fae faf fan fao fap far fat fca fcc fce fcf fcn fco fcp fcr fct fea fec fee fef fen feo fep fer fet ffa ffc ffe fff ffn ffo ffp ffr fft fna fnc fne fnf fnn fnp fnr fnt foa foc foe fof fon foo fop for fot fpa fpc fpe fpn fpo fpp fpr fpt fra frc fre frf frn fro frp frr frt fta ftc fte ftf ftn fto ftp ftr ftt naa nac nae naf nan nao nap nar nat nca ncc nce ncf ncn nco ncp ncr nct ne- nea nec nee nef nen neo nep ner net nfa nfc nfe nff nfn nfo nfp nfr nft nna nnc nne nnf nnn nno nnp nnt no- noa noc noe nof non noo nop nor not npa npc npe npf npn npo npp npr npt nra nrc nre nrf nrn nro nrp nrr nrt nta ntc nte ntf ntn nto ntp ntr ntt oaa oac oae oaf oan oao oap oar oat oc- oca occ ocf ocn oco ocp ocr oct oea oec oee oef oen oeo oep oer oet of- ofa ofc ofe off ofn ofo ofp ofr oft on- ona onc one onf onn ono onp onr ont oo- ooa ooc oof oon ooo oop oor oot op- opa opc ope opf opn opo opp opr opt or- ora orc ore orf orn oro orp orr ort ot- ota otc ote otf otn oto otp otr ott p-p paa pac pae paf pan pao pap par pat pca pcc pce pcf pcn pco pcp pcr pct pea pec pee pef pen peo pep per pet pfa pfc pfe pff pfn pfo pfp pfr pft pn- pna pnc pne pnf pnn pno pnp pnr pnt poa poc poe pof pon poo pop por pot ppa ppc ppe ppf ppn ppo ppp ppr ppt pra prc pre prf prn pro prp prr prt pt- pta ptc pte ptf ptn pto ptp ptr ptt ra- raa rac rae raf ran rao rap rar rat rca rcc rce rcf rcn rco rcp rcr rct re- rea rec ree ref ren reo rep rer ret rfa rfc rfe rff rfn rfo rfp rfr rft rna rnc rnn rno rnp rnr rnt roa roc roe rof ron roo rop ror rot rpa rpc rpe rpf rpn rpo rpp rpr rpt rra rrc rrf rrn rrp rrr rrt rta rtc rte rtf rtn rto rtp rtr rtt taa tac tae taf tan tao tap tar tat tca tcc tce tcf tcn tco tcp tcr tct te- tea tec tee tef ten teo tep ter tet tfa tfc tfe tff tfn tfo tfp tfr tft tna tnc tne tnf tnn tno tnp tnr tnt to- toa toc toe tof ton too top tor tot tpa tpc tpe tpf tpn tpo tpp tpr tpt tra trc tre trf trn tro trp trr trt tta ttc tte ttf ttn tto ttp ttr ttt