a-a a-c a-t aaa aac aad aak aan aao aas aat ac- aca acc acd ack acn aco acs act ad- ada adc add adk adn ado ads adt aka akc akd akk akn ako aks an- ana anc and ank ann ano ans ant aoa aoc aod aok aon aoo aos aot as- asa asc asd ask asn aso ass ast at- ata atc atd atn ato ats att c-- caa cac cad cak can cao cas cat cca ccc ccd cck ccn cco ccs cct cda cdc cdd cdk cdn cdo cds cdt cka ckc ckd cko cks ckt cn- cna cnc cnd cnn cno cns cnt co- coa coc cod cok con coo cos cot csa csc csd csk csn cso css cst cta ctc ctd ctk ctn cto cts ctt daa dac dad dak dan dao das dat dca dcc dcd dck dcn dco dcs dct dda ddc ddd ddk ddn ddo dds ddt dka dkc dkk dko dks dkt dna dnc dnd dnk dnn dno dns dnt doa doc dod dok don doo dos dot dsa dsc dsd dsk dsn dso dss dst dta dtc dtd dtk dtn dto dts dtt k-t ka- kaa kac kad kak kan kao kas kat kca kcc kcd kck kcn kcs kct kda kdc kdk kdo kds kdt kkc kkk kkn kks kkt kn- kna knc knd knk knn kno knt koa koc kod kok kon koo kos kot ksa ksc ksd ksk ksn kso kss kst kta ktc ktk ktn kto kts ktt naa nac nad nak nan nao nas nat nca ncc ncd nck ncn nco ncs nct nda ndc ndd ndk ndn ndo nds ndt nka nkc nkk nkn nko nks nkt nna nnc nnk nnn nno nns nnt no- noa noc nod nok non noo nos not nsa nsc nsd nsk nsn nso nss nst nta ntc ntd ntk ntn nto nts ntt oaa oac oad oak oan oao oas oat oc- oca occ ocd ock ocn oco ocs oct oda odc odd odn odo ods odt oka okc okd okk oko oks on- ona onc ond onk onn ono ons ont oo- ooa ooc ood ook oon ooo oos oot os- osa osc osd osk osn oso oss ost ot- ota otc otd otk otn oto ots ott saa sac sad sak san sao sas sat sca scc scd sck scn sco scs sct sda sdc sdd sdk sdn sdo sds sdt sk- ska skc skd skk sko sks skt sna snc snd snk snn sno sns snt soa soc sod sok son soo sos sot ss- ssa ssc ssd ssk ssn sso sss sst sta stc std stk stn sto sts stt taa tac tad tak tan tao tas tat tca tcc tcd tck tcn tco tcs tct tda tdc tdd tdk tdn tdo tds tdt tka tkc tkk tko tks tkt tna tnc tnd tnk tnn tno tns tnt to- toa toc tod tok ton too tos tot tsa tsc tsd tsk tsn tso tss tst tta ttc ttd ttk ttn tto tts ttt