a-a a-c a-t aaa aac aak aao aap aat ac- aca acc ack aco acp act aka akc akk ako akp aoa aoc aok aoo aop aot ap- apa apc apk apo app apt at- ata atc ato atp att c-- caa cac cak cao cap cat cca ccc cck cco ccp cct cka ckc cko ckt co- coa coc cok coo cop cot cpa cpc cpk cpo cpp cpt cta ctc ctk cto ctp ctt k-t ka- kaa kac kak kao kap kat kca kcc kck kcp kct kkc kkk kkp kkt koa koc kok koo kop kot kpa kpc kpk kpo kpp kpt kta ktc ktk kto ktp ktt oaa oac oak oao oap oat oc- oca occ ock oco ocp oct oka okc okk oko okp oo- ooa ooc ook ooo oop oot op- opa opc opk opo opp opt ot- ota otc otk oto otp ott p-p paa pac pak pao pap pat pca pcc pck pco pcp pct pka pkc pko pkp pkt poa poc pok poo pop pot ppa ppc ppk ppo ppp ppt pt- pta ptc ptk pto ptp ptt taa tac tak tao tap tat tca tcc tck tco tcp tct tka tkc tkk tko tkp tkt to- toa toc tok too top tot tpa tpc tpk tpo tpp tpt tta ttc ttk tto ttp ttt