a-a a-c a-t aaa aac aad aaf aao aap aar aat ac- aca acc acd acf aco acp acr act ad- ada adc add adf ado adp adr adt af- afa afc afd aff afo afp afr aft aoa aoc aod aof aoo aop aor aot ap- apa apc apd apf apo app apr apt ar- ara arc ard arf aro arp arr art at- ata atc atd atf ato atp atr att c-- caa cac cad caf cao cap car cat cca ccc ccd ccf cco ccp ccr cct cda cdc cdd cdf cdo cdp cdr cdt cfa cfc cfd cff cfo cfp cfr cft co- coa coc cod cof coo cop cor cot cpa cpc cpd cpf cpo cpp cpr cpt cra crc crd crf cro crp crr crt cta ctc ctd ctf cto ctp ctr ctt daa dac dad daf dao dap dar dat dca dcc dcd dcf dco dcp dcr dct dda ddc ddd ddf ddo ddp ddr ddt dfa dfc dfd dff dfo dfp dfr dft doa doc dod dof doo dop dor dot dpa dpc dpd dpf dpo dpp dpr dpt dra drc drd dro drp drr drt dta dtc dtd dtf dto dtp dtr dtt faa fac fad faf fao fap far fat fca fcc fcd fcf fco fcp fcr fct fda fdc fdd fdf fdo fdp fdr fdt ffa ffc ffd fff ffo ffp ffr fft foa foc fof foo fop for fot fpa fpc fpd fpo fpp fpr fpt fra frc frd frf fro frp frr frt fta ftc ftd ftf fto ftp ftr ftt oaa oac oad oaf oao oap oar oat oc- oca occ ocd ocf oco ocp ocr oct oda odc odd odf odo odp odr odt of- ofa ofc ofd off ofo ofp ofr oft oo- ooa ooc ood oof ooo oop oor oot op- opa opc opd opf opo opp opr opt or- ora orc ord orf oro orp orr ort ot- ota otc otd otf oto otp otr ott p-p paa pac pad paf pao pap par pat pca pcc pcd pcf pco pcp pcr pct pda pdc pdd pdf pdo pdp pdr pdt pfa pfc pfd pff pfo pfp pfr pft poa poc pod pof poo pop por pot ppa ppc ppd ppf ppo ppp ppr ppt pra prc prd prf pro prp prr prt pt- pta ptc ptd ptf pto ptp ptr ptt ra- raa rac rad raf rao rap rar rat rca rcc rcd rcf rco rcp rcr rct rda rdc rdd rdf rdo rdp rdr rdt rfa rfc rfd rff rfo rfp rfr rft roa roc rod rof roo rop ror rot rpa rpc rpd rpf rpo rpp rpr rpt rra rrc rrd rrf rrp rrr rrt rta rtc rtd rtf rto rtp rtr rtt taa tac tad taf tao tap tar tat tca tcc tcd tcf tco tcp tcr tct tda tdc tdd tdf tdo tdp tdr tdt tfa tfc tfd tff tfo tfp tfr tft to- toa toc tod tof too top tor tot tpa tpc tpd tpf tpo tpp tpr tpt tra trc trd trf tro trp trr trt tta ttc ttd ttf tto ttp ttr ttt