a-a a-b a-t aaa aab aad aam aan aas aat ab- aba abb abd abm abn abs abt ad- ada adb add adm adn ads adt ama amb amd amm amn ams amt an- ana anb and anm ann ans ant as- asa asb asd asm asn ass ast at- ata atb atd atm atn ats att baa bab bad bam ban bas bat bba bbb bbd bbm bbn bbs bbt bda bdb bdd bdm bds bdt bma bmb bmd bmm bmn bms bmt bna bnb bnd bnn bns bnt bsa bsb bsd bsm bsn bss bst bta btb btd btm btn bts btt daa dab dad dam dan das dat dba dbb dbd dbm dbn dbs dbt dda ddb ddd ddm ddn dds ddt dma dmb dmd dmm dmn dms dmt dna dnb dnd dnm dnn dns dnt dsa dsb dsd dsm dsn dss dst dta dtb dtd dtm dtn dts dtt maa mab mad mam man mas mat mba mbb mbd mbm mbs mbt mda mdb mdd mdm mdn mds mdt mma mmb mmd mmm mmn mms mmt mna mnb mnm mnn mns mnt msa msb msd msm msn mss mst mta mtb mtd mtm mtn mts mtt naa nab nad nam nan nas nat nba nbb nbd nbm nbn nbs nbt nda ndb ndd ndm ndn nds ndt nma nmb nmd nmm nmn nms nmt nna nnb nnm nnn nns nnt nsa nsb nsd nsm nsn nss nst nta ntb ntd ntm ntn nts ntt saa sab sad sam san sas sat sba sbb sbd sbm sbn sbs sbt sda sdb sdd sdm sdn sds sdt sma smb smd smm smn sms smt sna snb snd snm snn sns snt ss- ssa ssb ssd ssm ssn sss sst sta stb std stm stn sts stt taa tab tad tam tan tas tat tba tbb tbd tbm tbn tbs tbt tda tdb tdd tdm tdn tds tdt tma tmb tmd tmm tmn tms tmt tna tnb tnd tnm tnn tns tnt tsa tsb tsd tsm tsn tss tst tta ttb ttd ttm ttn tts ttt