a-a a-c a-t aaa aac aae aak aao aap aat ac- aca acc ace ack aco acp act aea aec aee aek aeo aep aet aka akc ake akk ako akp aoa aoc aoe aok aoo aop aot ap- apa apc ape apk apo app apt at- ata atc ate ato atp att c-- caa cac cae cak cao cap cat cca ccc cce cck cco ccp cct ce- cea cec cee cek ceo cep cet cka ckc cko ckt co- coa coc coe cok coo cop cot cpa cpc cpe cpk cpo cpp cpt cta ctc cte ctk cto ctp ctt eaa eac eae eak eao eap eat ec- eca ecc ece eck eco ect eea eec eee eek eeo eep eet eka ekc eke eko ekp ekt eo- eoa eoc eoe eok eoo eop eot ep- epa epc epe epo epp ept eta etc ete etk eto etp ett k-t ka- kaa kac kae kak kao kap kat kca kcc kce kck kcp kct ke- kea kec kee kek keo kep ket kkc kke kkk kkp kkt koa koc koe kok koo kop kot kpa kpc kpe kpk kpo kpp kpt kta ktc kte ktk kto ktp ktt oaa oac oae oak oao oap oat oc- oca occ ock oco ocp oct oea oec oee oeo oep oet oka okc oke okk oko okp oo- ooa ooc ook ooo oop oot op- opa opc ope opk opo opp opt ot- ota otc ote otk oto otp ott p-p paa pac pae pak pao pap pat pca pcc pce pck pco pcp pct pea pec pee pek peo pep pet pka pkc pke pko pkp pkt poa poc poe pok poo pop pot ppa ppc ppe ppk ppo ppp ppt pt- pta ptc pte ptk pto ptp ptt taa tac tae tak tao tap tat tca tcc tce tck tco tcp tct te- tea tec tee tek teo tep tet tka tkc tke tkk tko tkp tkt to- toa toc toe tok too top tot tpa tpc tpe tpk tpo tpp tpt tta ttc tte ttk tto ttp ttt