a-a a-c a-t aaa aac aak aao aap aas aat ac- aca acc ack aco acp acs act aka akc akk ako akp aks aoa aoc aok aoo aop aos aot ap- apa apc apk apo app aps apt as- asa asc ask aso asp ass ast at- ata atc ato atp ats att c-- caa cac cak cao cap cas cat cca ccc cck cco ccp ccs cct cka ckc cko cks ckt co- coa coc cok coo cop cos cot cpa cpc cpk cpo cpp cps cpt csa csc csk cso csp css cst cta ctc ctk cto ctp cts ctt k-t ka- kaa kac kak kao kap kas kat kca kcc kck kcp kcs kct kkc kkk kkp kks kkt koa koc kok koo kop kos kot kpa kpc kpk kpo kpp kps kpt ksa ksc ksk kso ksp kss kst kta ktc ktk kto ktp kts ktt oaa oac oak oao oap oas oat oc- oca occ ock oco ocp ocs oct oka okc okk oko okp oks oo- ooa ooc ook ooo oop oos oot op- opa opc opk opo opp ops opt os- osa osc osk oso osp oss ost ot- ota otc otk oto otp ots ott p-p paa pac pak pao pap pas pat pca pcc pck pco pcp pcs pct pka pkc pko pkp pks pkt poa poc pok poo pop pos pot ppa ppc ppk ppo ppp pps ppt ps- psa psc psk pso psp pss pst pt- pta ptc ptk pto ptp pts ptt saa sac sak sao sap sas sat sca scc sck sco scp scs sct sk- ska skc skk sko skp sks skt soa soc sok soo sop sos sot spa spc spk spo spp sps spt ss- ssa ssc ssk sso ssp sss sst sta stc stk sto stp sts stt taa tac tak tao tap tas tat tca tcc tck tco tcp tcs tct tka tkc tkk tko tkp tks tkt to- toa toc tok too top tos tot tpa tpc tpk tpo tpp tps tpt tsa tsc tsk tso tsp tss tst tta ttc ttk tto ttp tts ttt