a-a a-c a-t aaa aac aak aan aao aar aat ac- aca acc ack acn aco acr act aka akc akk akn ako akr an- ana anc ank ann ano anr ant aoa aoc aok aon aoo aor aot ar- ara arc ark arn aro arr art at- ata atc atn ato atr att c-- caa cac cak can cao car cat cca ccc cck ccn cco ccr cct cka ckc cko ckt cn- cna cnc cnn cno cnr cnt co- coa coc cok con coo cor cot cra crc crk crn cro crr crt cta ctc ctk ctn cto ctr ctt k-t ka- kaa kac kak kan kao kar kat kca kcc kck kcn kcr kct kkc kkk kkn kkr kkt kn- kna knc knk knn kno knr knt koa koc kok kon koo kor kot kra krc krk krn kro krr krt kta ktc ktk ktn kto ktr ktt naa nac nak nan nao nar nat nca ncc nck ncn nco ncr nct nka nkc nkk nkn nko nkr nkt nna nnc nnk nnn nno nnt no- noa noc nok non noo nor not nra nrc nrk nrn nro nrr nrt nta ntc ntk ntn nto ntr ntt oaa oac oak oan oao oar oat oc- oca occ ock ocn oco ocr oct oka okc okk oko okr on- ona onc onk onn ono onr ont oo- ooa ooc ook oon ooo oor oot or- ora orc ork orn oro orr ort ot- ota otc otk otn oto otr ott ra- raa rac rak ran rao rar rat rca rcc rcn rco rcr rct rkc rkk rko rkt rna rnc rnn rno rnr rnt roa roc rok ron roo ror rot rra rrc rrk rrn rrr rrt rta rtc rtk rtn rto rtr rtt taa tac tak tan tao tar tat tca tcc tck tcn tco tcr tct tka tkc tkk tko tkr tkt tna tnc tnk tnn tno tnr tnt to- toa toc tok ton too tor tot tra trc trk trn tro trr trt tta ttc ttk ttn tto ttr ttt