a-a a-b a-c a-t aaa aab aac aag aak aas aat aau ab- aba abb abc abg abk abs abt abu ac- aca acb acc acg ack acs act acu ag- aga agb agc agg agk ags agt agu aka akb akc akg akk aks aku as- asa asb asc asg ask ass ast asu at- ata atb atc atg ats att atu au- aua aub auc aug auk aus aut b-u baa bab bac bag bak bas bat bau bba bbb bbc bbg bbk bbs bbt bbu bca bcb bcc bcg bck bcs bct bcu bga bgb bgc bgg bgk bgs bgt bgu bka bkb bkc bkg bkk bks bkt bsa bsb bsc bsg bsk bss bst bsu bta btb btc btg btk bts btt btu bua bub buc bug buk bus but buu c-- caa cab cac cag cak cas cat cau cba cbb cbc cbg cbk cbs cbt cbu cca ccb ccc ccg cck ccs cct ccu cga cgb cgc cgg cgs cgt cgu cka ckb ckc cks ckt csa csb csc csg csk css cst csu cta ctb ctc ctg ctk cts ctt ctu cua cub cuc cug cuk cus cut cuu gaa gab gac gag gak gas gat gau gba gbc gbg gbk gbs gbt gbu gca gcb gcc gcg gck gcs gct gcu gga ggb ggc ggg ggs ggt ggu gka gkb gks gkt gsa gsb gsc gsg gsk gss gst gsu gta gtb gtc gtg gtk gts gtt gtu gu- gua gub guc gug guk gus gut guu k-t ka- kaa kab kac kag kak kas kat kau kba kbb kbc kbk kbs kbu kca kcb kcc kcg kck kcs kct kcu kga kgb kgc kgs kgu kkb kkc kkk kks kkt kku ksa ksb ksc ksg ksk kss kst ksu kta ktb ktc ktg ktk kts ktt ktu kub kuc kug kuk kus kut kuu saa sab sac sag sak sas sat sau sba sbb sbc sbg sbk sbs sbt sbu sca scb scc scg sck scs sct scu sga sgb sgc sgg sgk sgs sgt sgu sk- ska skb skc skg skk sks skt sku ss- ssa ssb ssc ssg ssk sss sst ssu sta stb stc stg stk sts stt stu sua sub suc sug suk sus sut suu taa tab tac tag tak tas tat tau tba tbb tbc tbg tbk tbs tbt tbu tca tcb tcc tcg tck tcs tct tcu tga tgb tgc tgg tgk tgs tgt tgu tka tkb tkc tkg tkk tks tkt tsa tsb tsc tsg tsk tss tst tsu tta ttb ttc ttg ttk tts ttt ttu tua tub tuc tug tuk tus tut tuu ua- uaa uab uac uag uak uas uat uau uba ubb ubc ubg ubk ubs ubt ubu uca ucb ucc ucg uck ucs uct ucu uga ugb ugc ugg ugk ugs ugt ugu uka ukb ukc ukk uku usa usb usc usg usk uss ust usu uta utb utc utk uts utt utu uua uuc uug uus uut uuu