a-a a-b a-i aaa aab aag aai aak aan aas ab- aba abb abg abi abk abn abs ag- aga agb agg agi agk agn ags ai- aia aib aig aii aik ain ais aka akb akg aki akk akn aks an- ana anb ang ani ank ann ans as- asa asb asg asi ask asn ass baa bab bag bai bak ban bas bba bbb bbg bbi bbk bbn bbs bga bgb bgg bgi bgk bgn bgs bi- bia bib big bii bik bin bis bka bkb bkg bkk bkn bks bna bnb bng bni bnk bnn bns bsa bsb bsg bsi bsk bsn bss gaa gab gag gai gak gan gas gba gbg gbi gbk gbn gbs gga ggb ggg ggi ggn ggs gia gib gig gii gik gin gis gka gkb gkn gks gna gnb gni gnn gns gsa gsb gsg gsi gsk gsn gss ia- iaa iab iag iai ian ias iba ibb ibg ibi ibk ibn ibs iga igb igg igi igk ign igs iia iib iii iin iis ika ikb iki ikk iks in- ina inb ing ini ink inn ins is- isa isb isg isi isk isn iss ka- kaa kab kag kai kak kan kas kba kbb kbi kbk kbn kbs kga kgb kgi kgs kia kib kig kii kik kin kis kkb kki kkk kkn kks kn- kna kng kni knk knn ksa ksb ksg ksi ksk ksn kss n-i naa nab nag nai nak nan nas nba nbb nbg nbi nbk nbn nbs nga ngb ngg ngi ngk ngn ngs nia nib nig nii nik nin nis nka nki nkk nkn nks nna nnb nng nni nnk nnn nns nsa nsb nsg nsi nsk nsn nss saa sab sag sai sak san sas sba sbb sbg sbi sbk sbn sbs sga sgb sgg sgi sgk sgn sgs sia sib sig sii sik sin sis sk- ska skb skg ski skk sks sna snb sng sni snk snn sns ss- ssa ssb ssg ssi ssk ssn sss