a-a a-b a-i a-t a-z aaa aab aai aan aap aar aat aaz ab- aba abb abi abn abp abr abt abz ai- aia aib aii ain aip air ait aiz an- ana anb ani ann anp anr ant anz ap- apa apb api apn app apr apt ar- ara arb ari arn arp arr art arz at- ata atb ati atn atp atr att atz az- aza azb azi azn azp azt azz b-p baa bab bai ban bap bar bat baz bba bbb bbi bbn bbp bbr bbt bi- bia bib bii bin bip bir bit biz bna bnb bni bnn bnp bnr bnt bnz bpa bpb bpi bpn bpp bpr bpt bra brb bri brn brp brr brt brz bta btb bti btn btp btr btt btz bza bzn bzp bzr bzz ia- iaa iab iai ian iap iar iat iaz iba ibb ibi ibn ibp ibr ibt ibz iia iib iii iin iip iir iit in- ina inb ini inn inp inr int ipa ipb ipi ipn ipp ipr ipt ir- ira irb iri irn irp irr irt ita itb iti itn itp itt itz iza izi izz n-i naa nab nai nan nap nar nat naz nba nbb nbi nbn nbp nbr nbt nia nib nii nin nip nir nit niz nna nnb nni nnn nnp nnt nnz npa npb npi npn npp npr npt npz nra nrb nri nrn nrp nrr nrt nrz nta ntb nti ntn ntp ntr ntt ntz nzb nzi nzp nzz p-p paa pab pai pan pap par pat paz pba pbb pbi pbn pbp pbr pbt pbz pia pib pii pin pip pir pit piz pn- pna pnb pni pnn pnp pnr pnt ppa ppb ppi ppn ppp ppr ppt ppz pra prb pri prn prp prr prt prz pt- pta ptb pti ptn ptp ptr ptt ptz pzp pzt ra- raa rab rai ran rap rar rat raz rba rbb rbi rbn rbp rbr rbt ria rib rii rin rip rir rit riz rna rnb rni rnn rnp rnr rnt rnz rpa rpb rpi rpn rpp rpr rpt rpz rra rrb rri rrn rrp rrr rrt rta rtb rti rtn rtp rtr rtt rtz rza rzb taa tab tai tan tap tar tat taz tba tbb tbi tbn tbp tbr tbt tbz tia tib tii tin tip tir tit tiz tna tnb tni tnn tnp tnr tnt tnz tpa tpb tpi tpn tpp tpr tpt tpz tra trb tri trn trp trr trt trz tta ttb tti ttn ttp ttr ttt tza zaa zab zai zan zap zar zat zaz zbb zbr zbt zia zib zin zip zir zit ziz znn znp zpi zpp zpr zpt zrp zta ztr zzr zzt zzz