a-a a-c a-t a-z aaa aac aan aao aap aat aaz ac- aca acc acn aco acp act acz an- ana anc ann ano anp ant anz aoa aoc aon aoo aop aot ap- apa apc apn apo app apt at- ata atc atn ato atp att atz az- aza azn azo azp azt azz c-- caa cac can cao cap cat caz cca ccc ccn cco ccp cct ccz cn- cna cnc cnn cno cnp cnt co- coa coc con coo cop cot coz cpa cpc cpn cpo cpp cpt cpz cta ctc ctn cto ctp ctt ctz cz- czc czo czt naa nac nan nao nap nat naz nca ncc ncn nco ncp nct nna nnc nnn nno nnp nnt nnz no- noa noc non noo nop not noz npa npc npn npo npp npt npz nta ntc ntn nto ntp ntt ntz nzo nzp nzz oaa oac oan oao oap oat oc- oca occ ocn oco ocp oct ocz on- ona onc onn ono onp ont oo- ooa ooc oon ooo oop oot op- opa opc opn opo opp opt ot- ota otc otn oto otp ott otz oza ozo ozt ozz p-p paa pac pan pao pap pat paz pca pcc pcn pco pcp pct pn- pna pnc pnn pno pnp pnt poa poc pon poo pop pot poz ppa ppc ppn ppo ppp ppt ppz pt- pta ptc ptn pto ptp ptt ptz pzc pzp pzt taa tac tan tao tap tat taz tca tcc tcn tco tcp tct tna tnc tnn tno tnp tnt tnz to- toa toc ton too top tot toz tpa tpc tpn tpo tpp tpt tpz tta ttc ttn tto ttp ttt tza zaa zac zan zao zap zat zaz zco znc znn zno znp zo- zoa zoc zon zoo zot zpc zpo zpp zpt zta zzt zzz