a-a a-b a-c a-t aaa aab aac aag aak aan aao aas aat ab- aba abb abc abg abk abn abo abs abt ac- aca acb acc acg ack acn aco acs act ag- aga agb agc agg agk agn ago ags agt aka akb akc akg akk akn ako aks an- ana anb anc ang ank ann ano ans ant aoa aob aoc aog aok aon aoo aos aot as- asa asb asc asg ask asn aso ass ast at- ata atb atc atg atn ato ats att baa bab bac bag bak ban bao bas bat bba bbb bbc bbg bbk bbn bbo bbs bbt bca bcb bcc bcg bck bcn bco bcs bct bga bgb bgc bgg bgk bgn bgo bgs bgt bka bkb bkc bkg bkk bkn bko bks bkt bna bnb bnc bng bnk bnn bno bns bnt boa bob boc bog bok bon boo bos bot bsa bsb bsc bsg bsk bsn bso bss bst bta btb btc btg btk btn bto bts btt c-- caa cab cac cag cak can cao cas cat cba cbb cbc cbg cbk cbn cbo cbs cbt cca ccb ccc ccg cck ccn cco ccs cct cga cgb cgc cgg cgn cgo cgs cgt cka ckb ckc cko cks ckt cn- cna cnb cnc cng cnn cno cns cnt co- coa cob coc cog cok con coo cos cot csa csb csc csg csk csn cso css cst cta ctb ctc ctg ctk ctn cto cts ctt gaa gab gac gag gak gan gao gas gat gba gbc gbg gbk gbn gbo gbs gbt gca gcb gcc gcg gck gcn gco gcs gct gga ggb ggc ggg ggn ggo ggs ggt gka gkb gkn gko gks gkt gna gnb gnc gnn gno gns gnt goa gob goc gog gok gon goo gos got gsa gsb gsc gsg gsk gsn gso gss gst gta gtb gtc gtg gtk gtn gto gts gtt k-t ka- kaa kab kac kag kak kan kao kas kat kba kbb kbc kbk kbn kbo kbs kca kcb kcc kcg kck kcn kcs kct kga kgb kgc kgo kgs kkb kkc kkk kkn kks kkt kn- kna knc kng knk knn kno knt koa kob koc kog kok kon koo kos kot ksa ksb ksc ksg ksk ksn kso kss kst kta ktb ktc ktg ktk ktn kto kts ktt naa nab nac nag nak nan nao nas nat nba nbb nbc nbg nbk nbn nbo nbs nbt nca ncb ncc ncg nck ncn nco ncs nct nga ngb ngc ngg ngk ngn ngo ngs ngt nka nkc nkk nkn nko nks nkt nna nnb nnc nng nnk nnn nno nns nnt no- noa nob noc nog nok non noo nos not nsa nsb nsc nsg nsk nsn nso nss nst nta ntb ntc ntg ntk ntn nto nts ntt oaa oab oac oag oak oan oao oas oat ob- oba obb obc obg obk obn obo obs obt oc- oca ocb occ ocg ock ocn oco ocs oct oga ogc ogg ogn ogo ogs ogt oka okb okc okg okk oko oks on- ona onb onc ong onk onn ono ons ont oo- ooa oob ooc oog ook oon ooo oos oot os- osa osb osc osg osk osn oso oss ost ot- ota otb otc otg otk otn oto ots ott saa sab sac sag sak san sao sas sat sba sbb sbc sbg sbk sbn sbo sbs sbt sca scb scc scg sck scn sco scs sct sga sgb sgc sgg sgk sgn sgo sgs sgt sk- ska skb skc skg skk sko sks skt sna snb snc sng snk snn sno sns snt soa sob soc sog sok son soo sos sot ss- ssa ssb ssc ssg ssk ssn sso sss sst sta stb stc stg stk stn sto sts stt taa tab tac tag tak tan tao tas tat tba tbb tbc tbg tbk tbn tbo tbs tbt tca tcb tcc tcg tck tcn tco tcs tct tga tgb tgc tgg tgk tgn tgo tgs tgt tka tkb tkc tkg tkk tko tks tkt tna tnb tnc tng tnk tnn tno tns tnt to- toa tob toc tog tok ton too tos tot tsa tsb tsc tsg tsk tsn tso tss tst tta ttb ttc ttg ttk ttn tto tts ttt