a-a a-b a-t aaa aab aae aaf aak aam aao aas aat ab- aba abb abe abf abk abm abo abs abt aea aeb aee aef aek aem aeo aes aet af- afa afb afe aff afk afm afo afs aft aka akb ake akk akm ako aks ama amb ame amf amk amm amo ams amt aoa aob aoe aof aok aom aoo aos aot as- asa asb ase asf ask asm aso ass ast at- ata atb ate atf atm ato ats att baa bab bae baf bak bam bao bas bat bba bbb bbe bbf bbk bbm bbo bbs bbt be- bea beb bee bef bek bem beo bes bet bfa bfb bfe bff bfm bfo bfs bft bka bkb bke bkf bkk bkm bko bks bkt bma bmb bme bmf bmk bmm bmo bms bmt boa bob boe bof bok bom boo bos bot bsa bsb bse bsf bsk bsm bso bss bst bta btb bte btf btk btm bto bts btt eaa eab eae eaf eak eam eao eas eat eba ebb ebe ebf ebk ebm ebo ebs ebt eea eeb eee eef eek eem eeo ees eet ef- efa efb efe eff efm efo efs eft eka ekb eke ekf eko eks ekt em- ema emb eme emf emk emm emo ems emt eo- eoa eob eoe eof eok eom eoo eos eot es- esa esb ese esf esk esm eso ess est eta etb ete etf etk etm eto ets ett faa fab fae faf fak fam fao fas fat fba fbb fbe fbf fbk fbm fbo fbs fbt fea feb fee fef fek fem feo fes fet ffa ffe fff ffk ffm ffo ffs fft fka fkb fkf fkk fkm fkt fma fmb fme fmf fmm fmo fms fmt foa fob foe fof fok fom foo fos fot fsa fsb fse fsf fsk fsm fso fss fst fta ftb fte ftf ftk ftm fto fts ftt k-t ka- kaa kab kae kaf kak kam kao kas kat kba kbb kbe kbf kbk kbm kbo kbs ke- kea keb kee kef kek kem keo kes ket kfa kff kfm kfo kfs kkb kke kkk kkm kks kkt kma kmb kme kmf kmk kmm kmo kms kmt koa kob koe kof kok kom koo kos kot ksa ksb kse ksf ksk ksm kso kss kst kta ktb kte ktf ktk ktm kto kts ktt m-f m-o maa mab mae maf mak mam mao mas mat mba mbb mbe mbf mbk mbm mbo mbs mbt mea meb mee mef mek mem meo mes met mfa mfb mfe mff mfm mfo mfs mft mka mkb mke mkk mkm mko mks mkt mma mmb mme mmf mmk mmm mmo mms mmt moa mob moe mof mok mom moo mos mot msa msb mse msf msk msm mso mss mst mta mtb mte mtf mtk mtm mto mts mtt oaa oab oae oaf oak oam oao oas oat ob- oba obb obe obf obk obm obo obs obt oea oeb oee oef oem oeo oes oet of- ofa ofb ofe off ofm ofo ofs oft oka okb oke okk oko oks om- oma omb ome omf omm omo oms omt oo- ooa oob oof ook oom ooo oos oot os- osa osb ose osf osk osm oso oss ost ot- ota otb ote otf otk otm oto ots ott saa sab sae saf sak sam sao sas sat sba sbb sbe sbf sbk sbm sbo sbs sbt se- sea seb see sef sek sem seo ses set sfa sfb sfe sff sfk sfm sfo sfs sft sk- ska skb ske skf skk skm sko sks skt sma smb sme smf smk smm smo sms smt soa sob soe sof sok som soo sos sot ss- ssa ssb sse ssf ssk ssm sso sss sst sta stb ste stf stk stm sto sts stt taa tab tae taf tak tam tao tas tat tba tbb tbe tbf tbk tbm tbo tbs tbt te- tea teb tee tef tek tem teo tes tet tfa tfb tfe tff tfk tfm tfo tfs tft tka tkb tke tkk tkm tko tks tkt tma tmb tme tmf tmk tmm tmo tms tmt to- toa tob toe tof tok tom too tos tot tsa tsb tse tsf tsk tsm tso tss tst tta ttb tte ttf ttk ttm tto tts ttt