a-a a-c a-t aaa aac aak aao aar aat ac- aca acc ack aco acr act aka akc akk ako akr aoa aoc aok aoo aor aot ar- ara arc ark aro arr art at- ata atc ato atr att c-- caa cac cak cao car cat cca ccc cck cco ccr cct cka ckc cko ckt co- coa coc cok coo cor cot cra crc crk cro crr crt cta ctc ctk cto ctr ctt k-t ka- kaa kac kak kao kar kat kca kcc kck kcr kct kkc kkk kkr kkt koa koc kok koo kor kot kra krc krk kro krr krt kta ktc ktk kto ktr ktt oaa oac oak oao oar oat oc- oca occ ock oco ocr oct oka okc okk oko okr oo- ooa ooc ook ooo oor oot or- ora orc ork oro orr ort ot- ota otc otk oto otr ott ra- raa rac rak rao rar rat rca rcc rco rcr rct rkc rkk rko rkt roa roc rok roo ror rot rra rrc rrk rrr rrt rta rtc rtk rto rtr rtt taa tac tak tao tar tat tca tcc tck tco tcr tct tka tkc tkk tko tkr tkt to- toa toc tok too tor tot tra trc trk tro trr trt tta ttc ttk tto ttr ttt