a-a a-b a-c a-t aaa aab aac aae aag aak aam aao aas aat ab- aba abb abc abe abg abk abm abo abs abt ac- aca acb acc ace acg ack acm aco acs act aea aeb aec aee aeg aek aem aeo aes aet ag- aga agb agc age agg agk agm ago ags agt aka akb akc ake akg akk akm ako aks ama amb amc ame amg amk amm amo ams amt aoa aob aoc aoe aog aok aom aoo aos aot as- asa asb asc ase asg ask asm aso ass ast at- ata atb atc ate atg atm ato ats att baa bab bac bae bag bak bam bao bas bat bba bbb bbc bbe bbg bbk bbm bbo bbs bbt bca bcb bcc bce bcg bck bcm bco bcs bct be- bea beb bec bee beg bek bem beo bes bet bga bgb bgc bge bgg bgk bgm bgo bgs bgt bka bkb bkc bke bkg bkk bkm bko bks bkt bma bmb bmc bme bmg bmk bmm bmo bms bmt boa bob boc boe bog bok bom boo bos bot bsa bsb bsc bse bsg bsk bsm bso bss bst bta btb btc bte btg btk btm bto bts btt c-- caa cab cac cae cag cak cam cao cas cat cba cbb cbc cbe cbg cbk cbm cbo cbs cbt cca ccb ccc cce ccg cck ccm cco ccs cct ce- cea ceb cec cee ceg cek cem ceo ces cet cga cgb cgc cge cgg cgm cgo cgs cgt cka ckb ckc ckm cko cks ckt cma cmb cmc cme cmg cmk cmm cmo cms cmt co- coa cob coc coe cog cok com coo cos cot csa csb csc cse csg csk csm cso css cst cta ctb ctc cte ctg ctk ctm cto cts ctt eaa eab eac eae eag eak eam eao eas eat eba ebb ebc ebe ebg ebk ebm ebo ebs ebt ec- eca ecb ecc ece ecg eck ecm eco ecs ect eea eeb eec eee eeg eek eem eeo ees eet ega egb egc ege egg egm ego egs egt eka ekb ekc eke ekg eko eks ekt em- ema emb emc eme emg emk emm emo ems emt eo- eoa eob eoc eoe eog eok eom eoo eos eot es- esa esb esc ese esg esk esm eso ess est eta etb etc ete etg etk etm eto ets ett gaa gab gac gae gag gak gam gao gas gat gba gbc gbe gbg gbk gbm gbo gbs gbt gca gcb gcc gce gcg gck gcm gco gcs gct ge- gea geb gec gee geg gek gem geo ges get gga ggb ggc ggg ggm ggo ggs ggt gka gkb gkm gko gks gkt gma gmb gmc gme gmg gmm gmo gms gmt goa gob goc goe gog gok gom goo gos got gsa gsb gsc gse gsg gsk gsm gso gss gst gta gtb gtc gte gtg gtk gtm gto gts gtt k-t ka- kaa kab kac kae kag kak kam kao kas kat kba kbb kbc kbe kbk kbm kbo kbs kca kcb kcc kce kcg kck kcm kcs kct ke- kea keb kec kee keg kek kem keo kes ket kga kgb kgc kgm kgo kgs kkb kkc kke kkk kkm kks kkt kma kmb kmc kme kmg kmk kmm kmo kms kmt koa kob koc koe kog kok kom koo kos kot ksa ksb ksc kse ksg ksk ksm kso kss kst kta ktb ktc kte ktg ktk ktm kto kts ktt m-o maa mab mac mae mag mak mam mao mas mat mba mbb mbc mbe mbg mbk mbm mbo mbs mbt mc- mca mcb mcc mce mcg mck mcm mco mcs mct mea meb mec mee meg mek mem meo mes met mga mgb mgc mge mgk mgm mgo mgs mgt mka mkb mkc mke mkg mkk mkm mko mks mkt mma mmb mmc mme mmg mmk mmm mmo mms mmt moa mob moc moe mog mok mom moo mos mot msa msb msc mse msg msk msm mso mss mst mta mtb mtc mte mtg mtk mtm mto mts mtt oaa oab oac oae oag oak oam oao oas oat ob- oba obb obc obe obg obk obm obo obs obt oc- oca ocb occ ocg ock ocm oco ocs oct oea oeb oec oee oeg oem oeo oes oet oga ogc oge ogg ogo ogs ogt oka okb okc oke okg okk oko oks om- oma omb omc ome omg omm omo oms omt oo- ooa oob ooc oog ook oom ooo oos oot os- osa osb osc ose osg osk osm oso oss ost ot- ota otb otc ote otg otk otm oto ots ott saa sab sac sae sag sak sam sao sas sat sba sbb sbc sbe sbg sbk sbm sbo sbs sbt sca scb scc sce scg sck scm sco scs sct se- sea seb sec see seg sek sem seo ses set sga sgb sgc sge sgg sgk sgm sgo sgs sgt sk- ska skb skc ske skg skk skm sko sks skt sma smb smc sme smg smk smm smo sms smt soa sob soc soe sog sok som soo sos sot ss- ssa ssb ssc sse ssg ssk ssm sso sss sst sta stb stc ste stg stk stm sto sts stt taa tab tac tae tag tak tam tao tas tat tba tbb tbc tbe tbg tbk tbm tbo tbs tbt tca tcb tcc tce tcg tck tcm tco tcs tct te- tea teb tec tee teg tek tem teo tes tet tga tgb tgc tge tgg tgk tgm tgo tgs tgt tka tkb tkc tke tkg tkk tkm tko tks tkt tma tmb tmc tme tmg tmk tmm tmo tms tmt to- toa tob toc toe tog tok tom too tos tot tsa tsb tsc tse tsg tsk tsm tso tss tst tta ttb ttc tte ttg ttk ttm tto tts ttt