a-a a-c a-t aaa aac aad aan aao aar aat ac- aca acc acd acn aco acr act ad- ada adc add adn ado adr adt an- ana anc and ann ano anr ant aoa aoc aod aon aoo aor aot ar- ara arc ard arn aro arr art at- ata atc atd atn ato atr att c-- caa cac cad can cao car cat cca ccc ccd ccn cco ccr cct cda cdc cdd cdn cdo cdr cdt cn- cna cnc cnd cnn cno cnr cnt co- coa coc cod con coo cor cot cra crc crd crn cro crr crt cta ctc ctd ctn cto ctr ctt daa dac dad dan dao dar dat dca dcc dcd dcn dco dcr dct dda ddc ddd ddn ddo ddr ddt dna dnc dnd dnn dno dnr dnt doa doc dod don doo dor dot dra drc drd drn dro drr drt dta dtc dtd dtn dto dtr dtt naa nac nad nan nao nar nat nca ncc ncd ncn nco ncr nct nda ndc ndd ndn ndo ndr ndt nna nnc nnn nno nnt no- noa noc nod non noo nor not nra nrc nrd nrn nro nrr nrt nta ntc ntd ntn nto ntr ntt oaa oac oad oan oao oar oat oc- oca occ ocd ocn oco ocr oct oda odc odd odn odo odr odt on- ona onc ond onn ono onr ont oo- ooa ooc ood oon ooo oor oot or- ora orc ord orn oro orr ort ot- ota otc otd otn oto otr ott ra- raa rac rad ran rao rar rat rca rcc rcd rcn rco rcr rct rda rdc rdd rdn rdo rdr rdt rna rnc rnd rnn rno rnr rnt roa roc rod ron roo ror rot rra rrc rrd rrn rrr rrt rta rtc rtd rtn rto rtr rtt taa tac tad tan tao tar tat tca tcc tcd tcn tco tcr tct tda tdc tdd tdn tdo tdr tdt tna tnc tnd tnn tno tnr tnt to- toa toc tod ton too tor tot tra trc trd trn tro trr trt tta ttc ttd ttn tto ttr ttt