a-a a-c a-t aaa aac aak aao aap aar aat ac- aca acc ack aco acp acr act aka akc akk ako akp akr aoa aoc aok aoo aop aor aot ap- apa apc apk apo app apr apt ar- ara arc ark aro arp arr art at- ata atc ato atp atr att c-- caa cac cak cao cap car cat cca ccc cck cco ccp ccr cct cka ckc cko ckt co- coa coc cok coo cop cor cot cpa cpc cpk cpo cpp cpr cpt cra crc crk cro crp crr crt cta ctc ctk cto ctp ctr ctt k-t ka- kaa kac kak kao kap kar kat kca kcc kck kcp kcr kct kkc kkk kkp kkr kkt koa koc kok koo kop kor kot kpa kpc kpk kpo kpp kpr kpt kra krc krk kro krp krr krt kta ktc ktk kto ktp ktr ktt oaa oac oak oao oap oar oat oc- oca occ ock oco ocp ocr oct oka okc okk oko okp okr oo- ooa ooc ook ooo oop oor oot op- opa opc opk opo opp opr opt or- ora orc ork oro orp orr ort ot- ota otc otk oto otp otr ott p-p paa pac pak pao pap par pat pca pcc pck pco pcp pcr pct pka pkc pko pkp pkr pkt poa poc pok poo pop por pot ppa ppc ppk ppo ppp ppr ppt pra prc prk pro prp prr prt pt- pta ptc ptk pto ptp ptr ptt ra- raa rac rak rao rap rar rat rca rcc rco rcp rcr rct rkc rkk rko rkp rkt roa roc rok roo rop ror rot rpa rpc rpk rpo rpp rpr rpt rra rrc rrk rrp rrr rrt rta rtc rtk rto rtp rtr rtt taa tac tak tao tap tar tat tca tcc tck tco tcp tcr tct tka tkc tkk tko tkp tkr tkt to- toa toc tok too top tor tot tpa tpc tpk tpo tpp tpr tpt tra trc trk tro trp trr trt tta ttc ttk tto ttp ttr ttt