a-a a-b a-i a-t aaa aab aai aam aan aas aat ab- aba abb abi abm abn abs abt ai- aia aib aii aim ain ais ait ama amb ami amm amn ams amt an- ana anb ani anm ann ans ant as- asa asb asi asm asn ass ast at- ata atb ati atm atn ats att baa bab bai bam ban bas bat bba bbb bbi bbm bbn bbs bbt bi- bia bib bii bim bin bis bit bma bmb bmi bmm bmn bms bmt bna bnb bni bnn bns bnt bsa bsb bsi bsm bsn bss bst bta btb bti btm btn bts btt ia- iaa iab iai iam ian ias iat iba ibb ibi ibm ibn ibs ibt iia iib iii iim iin iis iit im- ima imb imi imm imn ims imt in- ina inb ini inm inn ins int is- isa isb isi ism isn iss ist ita itb iti itm itn its itt maa mab mai mam man mas mat mba mbb mbi mbm mbs mbt mi- mia mib mii mim min mis mit mma mmb mmi mmm mmn mms mmt mna mnb mni mnm mnn mns mnt msa msb msi msm msn mss mst mta mtb mti mtm mtn mts mtt n-i naa nab nai nam nan nas nat nba nbb nbi nbm nbn nbs nbt nia nib nii nim nin nis nit nma nmb nmi nmm nmn nms nmt nna nnb nni nnm nnn nns nnt nsa nsb nsi nsm nsn nss nst nta ntb nti ntm ntn nts ntt saa sab sai sam san sas sat sba sbb sbi sbm sbn sbs sbt sia sib sii sim sin sis sit sma smb smi smm smn sms smt sna snb sni snm snn sns snt ss- ssa ssb ssi ssm ssn sss sst sta stb sti stm stn sts stt taa tab tai tam tan tas tat tba tbb tbi tbm tbn tbs tbt tia tib tii tim tin tis tit tma tmb tmi tmm tmn tms tmt tna tnb tni tnm tnn tns tnt tsa tsb tsi tsm tsn tss tst tta ttb tti ttm ttn tts ttt