a-a a-b a-i a-t aaa aab aai aak aan aas aat ab- aba abb abi abk abn abs abt ai- aia aib aii aik ain ais ait aka akb aki akk akn aks an- ana anb ani ank ann ans ant as- asa asb asi ask asn ass ast at- ata atb ati atn ats att baa bab bai bak ban bas bat bba bbb bbi bbk bbn bbs bbt bi- bia bib bii bik bin bis bit bka bkb bkk bkn bks bkt bna bnb bni bnk bnn bns bnt bsa bsb bsi bsk bsn bss bst bta btb bti btk btn bts btt ia- iaa iab iai ian ias iat iba ibb ibi ibk ibn ibs ibt iia iib iii iin iis iit ika ikb iki ikk iks ikt in- ina inb ini ink inn ins int is- isa isb isi isk isn iss ist ita itb iti itk itn its itt k-t ka- kaa kab kai kak kan kas kat kba kbb kbi kbk kbn kbs kia kib kii kik kin kis kit kkb kki kkk kkn kks kkt kn- kna kni knk knn knt ksa ksb ksi ksk ksn kss kst kta ktb ktk ktn kts ktt n-i naa nab nai nak nan nas nat nba nbb nbi nbk nbn nbs nbt nia nib nii nik nin nis nit nka nki nkk nkn nks nkt nna nnb nni nnk nnn nns nnt nsa nsb nsi nsk nsn nss nst nta ntb nti ntk ntn nts ntt saa sab sai sak san sas sat sba sbb sbi sbk sbn sbs sbt sia sib sii sik sin sis sit sk- ska skb ski skk sks skt sna snb sni snk snn sns snt ss- ssa ssb ssi ssk ssn sss sst sta stb sti stk stn sts stt taa tab tai tak tan tas tat tba tbb tbi tbk tbn tbs tbt tia tib tii tik tin tis tit tka tkb tkk tks tkt tna tnb tni tnk tnn tns tnt tsa tsb tsi tsk tsn tss tst tta ttb tti ttk ttn tts ttt