a-a a-b a-i a-t a-z aaa aab aai aan aao aap aat aaz ab- aba abb abi abn abo abp abt abz ai- aia aib aii ain aio aip ait aiz an- ana anb ani ann ano anp ant anz aoa aob aoi aon aoo aop aot ap- apa apb api apn apo app apt at- ata atb ati atn ato atp att atz az- aza azb azi azn azo azp azt azz b-p baa bab bai ban bao bap bat baz bba bbb bbi bbn bbo bbp bbt bi- bia bib bii bin bio bip bit biz bna bnb bni bnn bno bnp bnt bnz boa bob boi bon boo bop bot boz bpa bpb bpi bpn bpo bpp bpt bta btb bti btn bto btp btt btz bza bzn bzo bzp bzz ia- iaa iab iai ian iao iap iat iaz iba ibb ibi ibn ibo ibp ibt ibz iia iib iii iin iio iip iit in- ina inb ini inn ino inp int io- ioa iob ioi ion ioo iop iot ipa ipb ipi ipn ipo ipp ipt ita itb iti itn ito itp itt itz iza izi izo izz n-i naa nab nai nan nao nap nat naz nba nbb nbi nbn nbo nbp nbt nia nib nii nin nio nip nit niz nna nnb nni nnn nno nnp nnt nnz no- noa nob noi non noo nop not noz npa npb npi npn npo npp npt npz nta ntb nti ntn nto ntp ntt ntz nzb nzi nzo nzp nzz o-i oaa oab oai oan oao oap oat ob- oba obb obi obn obo obp obt oia oib oii oin oio oip oit oiz on- ona onb oni onn ono onp ont oo- ooa oob ooi oon ooo oop oot op- opa opb opi opn opo opp opt ot- ota otb oti otn oto otp ott otz oza ozo ozt ozz p-p paa pab pai pan pao pap pat paz pba pbb pbi pbn pbo pbp pbt pbz pia pib pii pin pio pip pit piz pn- pna pnb pni pnn pno pnp pnt poa pob poi pon poo pop pot poz ppa ppb ppi ppn ppo ppp ppt ppz pt- pta ptb pti ptn pto ptp ptt ptz pzp pzt taa tab tai tan tao tap tat taz tba tbb tbi tbn tbo tbp tbt tbz tia tib tii tin tio tip tit tiz tna tnb tni tnn tno tnp tnt tnz to- toa tob toi ton too top tot toz tpa tpb tpi tpn tpo tpp tpt tpz tta ttb tti ttn tto ttp ttt tza zaa zab zai zan zao zap zat zaz zbb zbt zia zib zin zio zip zit ziz znn zno znp zo- zoa zob zoi zon zoo zot zpi zpo zpp zpt zta zzt zzz