-er a-a a-c a-t aaa aac aae aag aak aan aao aap aar aat ac- aca acc ace acg ack acn aco acp acr act aea aec aee aeg aek aen aeo aep aer aet ag- aga agc age agg agk agn ago agp agr agt aka akc ake akg akk akn ako akp akr an- ana anc ane ang ank ann ano anp anr ant aoa aoc aoe aog aok aon aoo aop aor aot ap- apa apc ape apg apk apn apo app apr apt ar- ara arc are arg ark arn aro arp arr art at- ata atc ate atg atn ato atp atr att c-- caa cac cae cag cak can cao cap car cat cca ccc cce ccg cck ccn cco ccp ccr cct ce- cea cec cee ceg cek cen ceo cep cer cet cga cgc cge cgg cgn cgo cgp cgr cgt cka ckc cko ckt cn- cna cnc cne cng cnn cno cnp cnr cnt co- coa coc coe cog cok con coo cop cor cot cpa cpc cpe cpg cpk cpn cpo cpp cpr cpt cra crc cre crg crk crn cro crp crr crt cta ctc cte ctg ctk ctn cto ctp ctr ctt eaa eac eae eag eak ean eao eap ear eat ec- eca ecc ece ecg eck ecn eco ecr ect eea eec eee eeg eek een eeo eep eer eet ega egc ege egg egn ego egp egr egt eka ekc eke ekg eko ekp ekr ekt en- ena enc ene eng enk enn eno enp enr ent eo- eoa eoc eoe eog eok eon eoo eop eor eot ep- epa epc epe epg epn epo epp epr ept era erc ere erg erk ern ero erp err ert eta etc ete etg etk etn eto etp etr ett g-p gaa gac gae gag gak gan gao gap gar gat gca gcc gce gcg gck gcn gco gcp gcr gct ge- gea gec gee geg gek gen geo gep ger get gga ggc ggg ggn ggo ggp ggr ggt gka gkn gko gkp gkt gna gnc gne gnn gno gnp gnr gnt goa goc goe gog gok gon goo gop gor got gpa gpc gpe gpg gpk gpn gpo gpp gpr gpt gra grc gre grg grk grn gro grp grr grt gta gtc gte gtg gtk gtn gto gtp gtr gtt k-t ka- kaa kac kae kag kak kan kao kap kar kat kca kcc kce kcg kck kcn kcp kcr kct ke- kea kec kee keg kek ken keo kep ker ket kga kgc kgo kgp kkc kke kkk kkn kkp kkr kkt kn- kna knc kne kng knk knn kno knp knr knt koa koc koe kog kok kon koo kop kor kot kpa kpc kpe kpk kpn kpo kpp kpr kpt kra krc krg krk krn kro krp krr krt kta ktc kte ktg ktk ktn kto ktp ktr ktt naa nac nae nag nak nan nao nap nar nat nca ncc nce ncg nck ncn nco ncp ncr nct ne- nea nec nee neg nek nen neo nep ner net nga ngc nge ngg ngk ngn ngo ngp ngt nka nkc nke nkk nkn nko nkp nkr nkt nna nnc nne nng nnk nnn nno nnp nnt no- noa noc noe nog nok non noo nop nor not npa npc npe npg npn npo npp npr npt nra nrc nre nrg nrk nrn nro nrp nrr nrt nta ntc nte ntg ntk ntn nto ntp ntr ntt oaa oac oae oag oak oan oao oap oar oat oc- oca occ ocg ock ocn oco ocp ocr oct oea oec oee oeg oen oeo oep oer oet oga ogc oge ogg ogn ogo ogp ogt oka okc oke okg okk oko okp okr on- ona onc one ong onk onn ono onp onr ont oo- ooa ooc oog ook oon ooo oop oor oot op- opa opc ope opg opk opn opo opp opr opt or- ora orc ore org ork orn oro orp orr ort ot- ota otc ote otg otk otn oto otp otr ott p-p paa pac pae pag pak pan pao pap par pat pca pcc pce pcg pck pcn pco pcp pcr pct pea pec pee peg pek pen peo pep per pet pga pgc pge pgg pgk pgn pgo pgp pgr pgt pka pkc pke pkg pkn pko pkp pkr pkt pn- pna pnc pne png pnk pnn pno pnp pnr pnt poa poc poe pog pok pon poo pop por pot ppa ppc ppe ppg ppk ppn ppo ppp ppr ppt pra prc pre prg prk prn pro prp prr prt pt- pta ptc pte ptg ptk ptn pto ptp ptr ptt ra- raa rac rae rag rak ran rao rap rar rat rca rcc rce rcg rcn rco rcp rcr rct re- rea rec ree reg rek ren reo rep rer ret rga rgc rge rgg rgk rgn rgo rgp rgr rgt rkc rke rkg rkk rko rkp rkt rna rnc rng rnn rno rnp rnr rnt roa roc roe rog rok ron roo rop ror rot rpa rpc rpe rpg rpk rpn rpo rpp rpr rpt rra rrc rrg rrk rrn rrp rrr rrt rta rtc rte rtg rtk rtn rto rtp rtr rtt taa tac tae tag tak tan tao tap tar tat tca tcc tce tcg tck tcn tco tcp tcr tct te- tea tec tee teg tek ten teo tep ter tet tga tgc tge tgg tgk tgn tgo tgp tgr tgt tka tkc tke tkg tkk tko tkp tkr tkt tna tnc tne tng tnk tnn tno tnp tnr tnt to- toa toc toe tog tok ton too top tor tot tpa tpc tpe tpg tpk tpn tpo tpp tpr tpt tra trc tre trg trk trn tro trp trr trt tta ttc tte ttg ttk ttn tto ttp ttr ttt