a-a a-b a-i a-t aaa aab aag aai aak aan aas aat ab- aba abb abg abi abk abn abs abt ag- aga agb agg agi agk agn ags agt ai- aia aib aig aii aik ain ais ait aka akb akg aki akk akn aks an- ana anb ang ani ank ann ans ant as- asa asb asg asi ask asn ass ast at- ata atb atg ati atn ats att baa bab bag bai bak ban bas bat bba bbb bbg bbi bbk bbn bbs bbt bga bgb bgg bgi bgk bgn bgs bgt bi- bia bib big bii bik bin bis bit bka bkb bkg bkk bkn bks bkt bna bnb bng bni bnk bnn bns bnt bsa bsb bsg bsi bsk bsn bss bst bta btb btg bti btk btn bts btt gaa gab gag gai gak gan gas gat gba gbg gbi gbk gbn gbs gbt gga ggb ggg ggi ggn ggs ggt gia gib gig gii gik gin gis git gka gkb gkn gks gkt gna gnb gni gnn gns gnt gsa gsb gsg gsi gsk gsn gss gst gta gtb gtg gti gtk gtn gts gtt ia- iaa iab iag iai ian ias iat iba ibb ibg ibi ibk ibn ibs ibt iga igb igg igi igk ign igs igt iia iib iii iin iis iit ika ikb iki ikk iks ikt in- ina inb ing ini ink inn ins int is- isa isb isg isi isk isn iss ist ita itb itg iti itk itn its itt k-t ka- kaa kab kag kai kak kan kas kat kba kbb kbi kbk kbn kbs kga kgb kgi kgs kia kib kig kii kik kin kis kit kkb kki kkk kkn kks kkt kn- kna kng kni knk knn knt ksa ksb ksg ksi ksk ksn kss kst kta ktb ktg ktk ktn kts ktt n-i naa nab nag nai nak nan nas nat nba nbb nbg nbi nbk nbn nbs nbt nga ngb ngg ngi ngk ngn ngs ngt nia nib nig nii nik nin nis nit nka nki nkk nkn nks nkt nna nnb nng nni nnk nnn nns nnt nsa nsb nsg nsi nsk nsn nss nst nta ntb ntg nti ntk ntn nts ntt saa sab sag sai sak san sas sat sba sbb sbg sbi sbk sbn sbs sbt sga sgb sgg sgi sgk sgn sgs sgt sia sib sig sii sik sin sis sit sk- ska skb skg ski skk sks skt sna snb sng sni snk snn sns snt ss- ssa ssb ssg ssi ssk ssn sss sst sta stb stg sti stk stn sts stt taa tab tag tai tak tan tas tat tba tbb tbg tbi tbk tbn tbs tbt tga tgb tgg tgi tgk tgn tgs tgt tia tib tig tii tik tin tis tit tka tkb tkg tkk tks tkt tna tnb tng tni tnk tnn tns tnt tsa tsb tsg tsi tsk tsn tss tst tta ttb ttg tti ttk ttn tts ttt