a-a a-c a-t aaa aac aae aaf aak aan aao aap aas aat ac- aca acc ace acf ack acn aco acp acs act aea aec aee aef aek aen aeo aep aes aet af- afa afc afe aff afk afn afo afp afs aft aka akc ake akk akn ako akp aks an- ana anc ane anf ank ann ano anp ans ant aoa aoc aoe aof aok aon aoo aop aos aot ap- apa apc ape apf apk apn apo app aps apt as- asa asc ase asf ask asn aso asp ass ast at- ata atc ate atf atn ato atp ats att c-- caa cac cae caf cak can cao cap cas cat cca ccc cce ccf cck ccn cco ccp ccs cct ce- cea cec cee cef cek cen ceo cep ces cet cfa cfc cfe cff cfk cfn cfo cfp cfs cft cka ckc cko cks ckt cn- cna cnc cne cnf cnn cno cnp cns cnt co- coa coc coe cof cok con coo cop cos cot cpa cpc cpe cpf cpk cpn cpo cpp cps cpt csa csc cse csf csk csn cso csp css cst cta ctc cte ctf ctk ctn cto ctp cts ctt eaa eac eae eaf eak ean eao eap eas eat ec- eca ecc ece ecf eck ecn eco ecs ect eea eec eee eef eek een eeo eep ees eet ef- efa efc efe eff efo efp efs eft eka ekc eke ekf eko ekp eks ekt en- ena enc ene enf enk enn eno enp ens ent eo- eoa eoc eoe eof eok eon eoo eop eos eot ep- epa epc epe epf epn epo epp eps ept es- esa esc ese esf esk esn eso esp ess est eta etc ete etf etk etn eto etp ets ett faa fac fae faf fak fan fao fap fas fat fca fcc fce fcf fck fcn fco fcp fcs fct fea fec fee fef fek fen feo fep fes fet ffa ffc ffe fff ffk ffn ffo ffp ffs fft fka fkc fkf fkk fkp fkt fna fnc fne fnf fnk fnn fnp fns fnt foa foc foe fof fok fon foo fop fos fot fpa fpc fpe fpk fpn fpo fpp fps fpt fsa fsc fse fsf fsk fsn fso fsp fss fst fta ftc fte ftf ftk ftn fto ftp fts ftt k-t ka- kaa kac kae kaf kak kan kao kap kas kat kca kcc kce kck kcn kcp kcs kct ke- kea kec kee kef kek ken keo kep kes ket kfa kfc kff kfo kfs kkc kke kkk kkn kkp kks kkt kn- kna knc kne knf knk knn kno knp knt koa koc koe kof kok kon koo kop kos kot kpa kpc kpe kpf kpk kpn kpo kpp kps kpt ksa ksc kse ksf ksk ksn kso ksp kss kst kta ktc kte ktf ktk ktn kto ktp kts ktt naa nac nae naf nak nan nao nap nas nat nca ncc nce ncf nck ncn nco ncp ncs nct ne- nea nec nee nef nek nen neo nep nes net nfa nfc nfe nff nfk nfn nfo nfp nfs nft nka nkc nke nkf nkk nkn nko nkp nks nkt nna nnc nne nnf nnk nnn nno nnp nns nnt no- noa noc noe nof nok non noo nop nos not npa npc npe npf npn npo npp nps npt nsa nsc nse nsf nsk nsn nso nsp nss nst nta ntc nte ntf ntk ntn nto ntp nts ntt oaa oac oae oaf oak oan oao oap oas oat oc- oca occ ocf ock ocn oco ocp ocs oct oea oec oee oef oen oeo oep oes oet of- ofa ofc ofe off ofn ofo ofp ofs oft oka okc oke okk oko okp oks on- ona onc one onf onk onn ono onp ons ont oo- ooa ooc oof ook oon ooo oop oos oot op- opa opc ope opf opk opn opo opp ops opt os- osa osc ose osf osk osn oso osp oss ost ot- ota otc ote otf otk otn oto otp ots ott p-p paa pac pae paf pak pan pao pap pas pat pca pcc pce pcf pck pcn pco pcp pcs pct pea pec pee pef pek pen peo pep pes pet pfa pfc pfe pff pfk pfn pfo pfp pfs pft pka pkc pke pkf pkn pko pkp pks pkt pn- pna pnc pne pnf pnk pnn pno pnp pns pnt poa poc poe pof pok pon poo pop pos pot ppa ppc ppe ppf ppk ppn ppo ppp pps ppt ps- psa psc pse psf psk psn pso psp pss pst pt- pta ptc pte ptf ptk ptn pto ptp pts ptt saa sac sae saf sak san sao sap sas sat sca scc sce scf sck scn sco scp scs sct se- sea sec see sef sek sen seo sep ses set sfa sfc sfe sff sfk sfn sfo sfp sfs sft sk- ska skc ske skf skk sko skp sks skt sna snc sne snf snk snn sno snp sns snt soa soc soe sof sok son soo sop sos sot spa spc spe spf spk spn spo spp sps spt ss- ssa ssc sse ssf ssk ssn sso ssp sss sst sta stc ste stf stk stn sto stp sts stt taa tac tae taf tak tan tao tap tas tat tca tcc tce tcf tck tcn tco tcp tcs tct te- tea tec tee tef tek ten teo tep tes tet tfa tfc tfe tff tfk tfn tfo tfp tfs tft tka tkc tke tkk tko tkp tks tkt tna tnc tne tnf tnk tnn tno tnp tns tnt to- toa toc toe tof tok ton too top tos tot tpa tpc tpe tpf tpk tpn tpo tpp tps tpt tsa tsc tse tsf tsk tsn tso tsp tss tst tta ttc tte ttf ttk ttn tto ttp tts ttt