a-a a-c a-t a-z aaa aac aae aan aap aat aaz ac- aca acc ace acn acp act acz aea aec aee aen aep aet aez an- ana anc ane ann anp ant anz ap- apa apc ape apn app apt at- ata atc ate atn atp att atz az- aza aze azn azp azt azz c-- caa cac cae can cap cat caz cca ccc cce ccn ccp cct ccz ce- cea cec cee cen cep cet cez cn- cna cnc cne cnn cnp cnt cpa cpc cpe cpn cpp cpt cpz cta ctc cte ctn ctp ctt ctz cz- czc cze czt eaa eac eae ean eap eat eaz ec- eca ecc ece ecn ect eea eec eee een eep eet en- ena enc ene enn enp ent enz ep- epa epc epe epn epp ept epz eta etc ete etn etp ett etz eze ezz naa nac nae nan nap nat naz nca ncc nce ncn ncp nct ne- nea nec nee nen nep net nez nna nnc nne nnn nnp nnt nnz npa npc npe npn npp npt npz nta ntc nte ntn ntp ntt ntz nze nzp nzz p-p paa pac pae pan pap pat paz pca pcc pce pcn pcp pct pea pec pee pen pep pet pez pn- pna pnc pne pnn pnp pnt ppa ppc ppe ppn ppp ppt ppz pt- pta ptc pte ptn ptp ptt ptz pzc pzp pzt taa tac tae tan tap tat taz tca tcc tce tcn tcp tct te- tea tec tee ten tep tet tez tna tnc tne tnn tnp tnt tnz tpa tpc tpe tpn tpp tpt tpz tta ttc tte ttn ttp ttt tza tze zaa zac zan zap zat zaz zce zea zec zee zen zep zet zez znc zne znn znp zpc zpe zpp zpt zta zte zzt zzz