a-a a-c a-t aaa aac aae aak aan aao aap aas aat ac- aca acc ace ack acn aco acp acs act aea aec aee aek aen aeo aep aes aet aka akc ake akk akn ako akp aks an- ana anc ane ank ann ano anp ans ant aoa aoc aoe aok aon aoo aop aos aot ap- apa apc ape apk apn apo app aps apt as- asa asc ase ask asn aso asp ass ast at- ata atc ate atn ato atp ats att c-- caa cac cae cak can cao cap cas cat cca ccc cce cck ccn cco ccp ccs cct ce- cea cec cee cek cen ceo cep ces cet cka ckc cko cks ckt cn- cna cnc cne cnn cno cnp cns cnt co- coa coc coe cok con coo cop cos cot cpa cpc cpe cpk cpn cpo cpp cps cpt csa csc cse csk csn cso csp css cst cta ctc cte ctk ctn cto ctp cts ctt eaa eac eae eak ean eao eap eas eat ec- eca ecc ece eck ecn eco ecs ect eea eec eee eek een eeo eep ees eet eka ekc eke eko ekp eks ekt en- ena enc ene enk enn eno enp ens ent eo- eoa eoc eoe eok eon eoo eop eos eot ep- epa epc epe epn epo epp eps ept es- esa esc ese esk esn eso esp ess est eta etc ete etk etn eto etp ets ett k-t ka- kaa kac kae kak kan kao kap kas kat kca kcc kce kck kcn kcp kcs kct ke- kea kec kee kek ken keo kep kes ket kkc kke kkk kkn kkp kks kkt kn- kna knc kne knk knn kno knp knt koa koc koe kok kon koo kop kos kot kpa kpc kpe kpk kpn kpo kpp kps kpt ksa ksc kse ksk ksn kso ksp kss kst kta ktc kte ktk ktn kto ktp kts ktt naa nac nae nak nan nao nap nas nat nca ncc nce nck ncn nco ncp ncs nct ne- nea nec nee nek nen neo nep nes net nka nkc nke nkk nkn nko nkp nks nkt nna nnc nne nnk nnn nno nnp nns nnt no- noa noc noe nok non noo nop nos not npa npc npe npn npo npp nps npt nsa nsc nse nsk nsn nso nsp nss nst nta ntc nte ntk ntn nto ntp nts ntt oaa oac oae oak oan oao oap oas oat oc- oca occ ock ocn oco ocp ocs oct oea oec oee oen oeo oep oes oet oka okc oke okk oko okp oks on- ona onc one onk onn ono onp ons ont oo- ooa ooc ook oon ooo oop oos oot op- opa opc ope opk opn opo opp ops opt os- osa osc ose osk osn oso osp oss ost ot- ota otc ote otk otn oto otp ots ott p-p paa pac pae pak pan pao pap pas pat pca pcc pce pck pcn pco pcp pcs pct pea pec pee pek pen peo pep pes pet pka pkc pke pkn pko pkp pks pkt pn- pna pnc pne pnk pnn pno pnp pns pnt poa poc poe pok pon poo pop pos pot ppa ppc ppe ppk ppn ppo ppp pps ppt ps- psa psc pse psk psn pso psp pss pst pt- pta ptc pte ptk ptn pto ptp pts ptt saa sac sae sak san sao sap sas sat sca scc sce sck scn sco scp scs sct se- sea sec see sek sen seo sep ses set sk- ska skc ske skk sko skp sks skt sna snc sne snk snn sno snp sns snt soa soc soe sok son soo sop sos sot spa spc spe spk spn spo spp sps spt ss- ssa ssc sse ssk ssn sso ssp sss sst sta stc ste stk stn sto stp sts stt taa tac tae tak tan tao tap tas tat tca tcc tce tck tcn tco tcp tcs tct te- tea tec tee tek ten teo tep tes tet tka tkc tke tkk tko tkp tks tkt tna tnc tne tnk tnn tno tnp tns tnt to- toa toc toe tok ton too top tos tot tpa tpc tpe tpk tpn tpo tpp tps tpt tsa tsc tse tsk tsn tso tsp tss tst tta ttc tte ttk ttn tto ttp tts ttt