a-a a-c a-t aaa aac aad aaf aan aao aap aat ac- aca acc acd acf acn aco acp act ad- ada adc add adf adn ado adp adt af- afa afc afd aff afn afo afp aft an- ana anc and anf ann ano anp ant aoa aoc aod aof aon aoo aop aot ap- apa apc apd apf apn apo app apt at- ata atc atd atf atn ato atp att c-- caa cac cad caf can cao cap cat cca ccc ccd ccf ccn cco ccp cct cda cdc cdd cdf cdn cdo cdp cdt cfa cfc cfd cff cfn cfo cfp cft cn- cna cnc cnd cnf cnn cno cnp cnt co- coa coc cod cof con coo cop cot cpa cpc cpd cpf cpn cpo cpp cpt cta ctc ctd ctf ctn cto ctp ctt daa dac dad daf dan dao dap dat dca dcc dcd dcf dcn dco dcp dct dda ddc ddd ddf ddn ddo ddp ddt dfa dfc dfd dff dfn dfo dfp dft dna dnc dnd dnf dnn dno dnp dnt doa doc dod dof don doo dop dot dpa dpc dpd dpf dpn dpo dpp dpt dta dtc dtd dtf dtn dto dtp dtt faa fac fad faf fan fao fap fat fca fcc fcd fcf fcn fco fcp fct fda fdc fdd fdf fdn fdo fdp fdt ffa ffc ffd fff ffn ffo ffp fft fna fnc fnd fnf fnn fnp fnt foa foc fof fon foo fop fot fpa fpc fpd fpn fpo fpp fpt fta ftc ftd ftf ftn fto ftp ftt naa nac nad naf nan nao nap nat nca ncc ncd ncf ncn nco ncp nct nda ndc ndd ndf ndn ndo ndp ndt nfa nfc nfd nff nfn nfo nfp nft nna nnc nnf nnn nno nnp nnt no- noa noc nod nof non noo nop not npa npc npd npf npn npo npp npt nta ntc ntd ntf ntn nto ntp ntt oaa oac oad oaf oan oao oap oat oc- oca occ ocd ocf ocn oco ocp oct oda odc odd odf odn odo odp odt of- ofa ofc ofd off ofn ofo ofp oft on- ona onc ond onf onn ono onp ont oo- ooa ooc ood oof oon ooo oop oot op- opa opc opd opf opn opo opp opt ot- ota otc otd otf otn oto otp ott p-p paa pac pad paf pan pao pap pat pca pcc pcd pcf pcn pco pcp pct pda pdc pdd pdf pdn pdo pdp pdt pfa pfc pfd pff pfn pfo pfp pft pn- pna pnc pnd pnf pnn pno pnp pnt poa poc pod pof pon poo pop pot ppa ppc ppd ppf ppn ppo ppp ppt pt- pta ptc ptd ptf ptn pto ptp ptt taa tac tad taf tan tao tap tat tca tcc tcd tcf tcn tco tcp tct tda tdc tdd tdf tdn tdo tdp tdt tfa tfc tfd tff tfn tfo tfp tft tna tnc tnd tnf tnn tno tnp tnt to- toa toc tod tof ton too top tot tpa tpc tpd tpf tpn tpo tpp tpt tta ttc ttd ttf ttn tto ttp ttt