a-a a-c a-t aaa aac aak aao aat aay ac- aca acc ack aco act acy aka akc akk ako aoa aoc aok aoo aot at- ata atc ato att ay- aya ayc ayk ayo ayt c-- caa cac cak cao cat cay cca ccc cck cco cct cka ckc cko ckt cky co- coa coc cok coo cot coy cta ctc ctk cto ctt cty cya cyc cyk cyo cyt k-t ka- kaa kac kak kao kat kay kca kcc kck kct kkc kkk kkt kky koa koc kok koo kot koy kta ktc ktk kto ktt kya kyc kyo kyt oaa oac oak oao oat oc- oca occ ock oco oct oka okc okk oko oo- ooa ooc ook ooo oot ot- ota otc otk oto ott oya oyo taa tac tak tao tat tay tca tcc tck tco tct tka tkc tkk tko tkt tky to- toa toc tok too tot toy tta ttc ttk tto ttt tty tya tyc tyo tyt yaa yac yak yao yat yay yca ycc yco ycy yka ykk yoc yok yoo yot yoy yta ytc ytk yto ytt yyc yyt yyy