a-a a-c a-t aaa aac aad aak aao aar aat ac- aca acc acd ack aco acr act ad- ada adc add adk ado adr adt aka akc akd akk ako akr aoa aoc aod aok aoo aor aot ar- ara arc ard ark aro arr art at- ata atc atd ato atr att c-- caa cac cad cak cao car cat cca ccc ccd cck cco ccr cct cda cdc cdd cdk cdo cdr cdt cka ckc ckd cko ckt co- coa coc cod cok coo cor cot cra crc crd crk cro crr crt cta ctc ctd ctk cto ctr ctt daa dac dad dak dao dar dat dca dcc dcd dck dco dcr dct dda ddc ddd ddk ddo ddr ddt dka dkc dkk dko dkr dkt doa doc dod dok doo dor dot dra drc drd drk dro drr drt dta dtc dtd dtk dto dtr dtt k-t ka- kaa kac kad kak kao kar kat kca kcc kcd kck kcr kct kda kdc kdk kdo kdr kdt kkc kkk kkr kkt koa koc kod kok koo kor kot kra krc krd krk kro krr krt kta ktc ktk kto ktr ktt oaa oac oad oak oao oar oat oc- oca occ ocd ock oco ocr oct oda odc odd odo odr odt oka okc okd okk oko okr oo- ooa ooc ood ook ooo oor oot or- ora orc ord ork oro orr ort ot- ota otc otd otk oto otr ott ra- raa rac rad rak rao rar rat rca rcc rcd rco rcr rct rda rdc rdd rdo rdr rdt rkc rkk rko rkt roa roc rod rok roo ror rot rra rrc rrd rrk rrr rrt rta rtc rtd rtk rto rtr rtt taa tac tad tak tao tar tat tca tcc tcd tck tco tcr tct tda tdc tdd tdk tdo tdr tdt tka tkc tkk tko tkr tkt to- toa toc tod tok too tor tot tra trc trd trk tro trr trt tta ttc ttd ttk tto ttr ttt