a-a a-t a-z aaa aan aao aap aat aaz an- ana ann ano anp ant anz aoa aon aoo aop aot ap- apa apn apo app apt at- ata atn ato atp att atz az- aza azn azo azp azt azz naa nan nao nap nat naz nna nnn nno nnp nnt nnz no- noa non noo nop not noz npa npn npo npp npt npz nta ntn nto ntp ntt ntz nzo nzp nzz oaa oan oao oap oat on- ona onn ono onp ont oo- ooa oon ooo oop oot op- opa opn opo opp opt ot- ota otn oto otp ott otz oza ozo ozt ozz p-p paa pan pao pap pat paz pn- pna pnn pno pnp pnt poa pon poo pop pot poz ppa ppn ppo ppp ppt ppz pt- pta ptn pto ptp ptt ptz pzp pzt taa tan tao tap tat taz tna tnn tno tnp tnt tnz to- toa ton too top tot toz tpa tpn tpo tpp tpt tpz tta ttn tto ttp ttt tza zaa zan zao zap zat zaz znn zno znp zo- zoa zon zoo zot zpo zpp zpt zta zzt zzz