a-a a-t a-z aaa aan aao aap aar aat aaz an- ana ann ano anp anr ant anz aoa aon aoo aop aor aot ap- apa apn apo app apr apt ar- ara arn aro arp arr art arz at- ata atn ato atp atr att atz az- aza azn azo azp azt azz naa nan nao nap nar nat naz nna nnn nno nnp nnt nnz no- noa non noo nop nor not noz npa npn npo npp npr npt npz nra nrn nro nrp nrr nrt nrz nta ntn nto ntp ntr ntt ntz nzo nzp nzz oaa oan oao oap oar oat on- ona onn ono onp onr ont oo- ooa oon ooo oop oor oot op- opa opn opo opp opr opt or- ora orn oro orp orr ort orz ot- ota otn oto otp otr ott otz oza ozo ozt ozz p-p paa pan pao pap par pat paz pn- pna pnn pno pnp pnr pnt poa pon poo pop por pot poz ppa ppn ppo ppp ppr ppt ppz pra prn pro prp prr prt prz pt- pta ptn pto ptp ptr ptt ptz pzp pzt ra- raa ran rao rap rar rat raz rna rnn rno rnp rnr rnt rnz roa ron roo rop ror rot roz rpa rpn rpo rpp rpr rpt rpz rra rrn rrp rrr rrt rta rtn rto rtp rtr rtt rtz rza rzo taa tan tao tap tar tat taz tna tnn tno tnp tnr tnt tnz to- toa ton too top tor tot toz tpa tpn tpo tpp tpr tpt tpz tra trn tro trp trr trt trz tta ttn tto ttp ttr ttt tza zaa zan zao zap zar zat zaz znn zno znp zo- zoa zon zoo zor zot zpo zpp zpr zpt zro zrp zta ztr zzr zzt zzz