a-a a-b a-i a-z aaa aab aai aan aar aas aaz ab- aba abb abi abn abr abs abz ai- aia aib aii ain air ais aiz an- ana anb ani ann anr ans anz ar- ara arb ari arn arr ars arz as- asa asb asi asn asr ass asz az- aza azb azi azn azs azz baa bab bai ban bar bas baz bba bbb bbi bbn bbr bbs bi- bia bib bii bin bir bis biz bna bnb bni bnn bnr bns bnz bra brb bri brn brr brs brz bsa bsb bsi bsn bsr bss bza bzn bzr bzs bzz ia- iaa iab iai ian iar ias iaz iba ibb ibi ibn ibr ibs ibz iia iib iii iin iir iis in- ina inb ini inn inr ins ir- ira irb iri irn irr irs is- isa isb isi isn isr iss iza izi izz n-i naa nab nai nan nar nas naz nba nbb nbi nbn nbr nbs nia nib nii nin nir nis niz nna nnb nni nnn nns nnz nra nrb nri nrn nrr nrs nrz nsa nsb nsi nsn nsr nss nsz nzb nzi nzs nzz ra- raa rab rai ran rar ras raz rba rbb rbi rbn rbr rbs ria rib rii rin rir ris riz rna rnb rni rnn rnr rns rnz rra rrb rri rrn rrr rrs rsa rsb rsi rsn rsr rss rza rzb saa sab sai san sar sas saz sba sbb sbi sbn sbr sbs sia sib sii sin sir sis sna snb sni snn snr sns sr- sra srb sri srn srr srs ss- ssa ssb ssi ssn ssr sss ssz sza szi szr zaa zab zai zan zar zas zaz zbb zbr zbs zia zib zin zir zis ziz znn zns zrs zsa zsi zsz zzr zzs zzz