-al a-a a-b a-c a-t aaa aab aac aag aal aar aat aau ab- aba abb abc abg abl abr abt abu ac- aca acb acc acg acl acr act acu ag- aga agb agc agg agl agr agt agu al- ala alb alc alg all alr alt alu ar- ara arb arc arg arl arr art aru at- ata atb atc atg atl atr att atu au- aua aub auc aug aul aur aut b-u baa bab bac bag bal bar bat bau bba bbb bbc bbg bbl bbr bbt bbu bca bcb bcc bcg bcl bcr bct bcu bga bgb bgc bgg bgl bgr bgt bgu bla blb blc blg bll blr blt blu bra brb brg brl brr brt bru bta btb btc btg btl btr btt btu bua bub buc bug bul bur but buu c-- caa cab cac cag cal car cat cau cba cbb cbc cbg cbl cbr cbt cbu cca ccb ccc ccg ccl ccr cct ccu cga cgb cgc cgg cgl cgr cgt cgu cl- cla clb clc clg cll clr clt clu cra crb crc crg crl crr crt cru cta ctb ctc ctg ctl ctr ctt ctu cua cub cuc cug cul cur cut cuu gaa gab gac gag gal gar gat gau gba gbc gbg gbl gbr gbt gbu gca gcb gcc gcg gcl gcr gct gcu gga ggb ggc ggg ggr ggt ggu gla glb glc glg gll glr glt glu gra grb grc grg grl grr grt gru gta gtb gtc gtg gtl gtr gtt gtu gu- gua gub guc gug gul gur gut guu la- laa lab lac lag lal lar lat lau lba lbb lbc lbg lbl lbr lbt lbu lca lcb lcc lcg lcl lcr lct lcu lga lgb lgc lgg lgl lgr lgt lgu lla llb llc llg lll llr llt llu lra lrb lrc lrg lrr lrt lru lta ltb ltc ltg ltl ltr ltt ltu lua lub luc lug lul lur lut luu ra- raa rab rac rag ral rar rat rau rba rbb rbc rbg rbl rbr rbt rbu rca rcb rcc rcg rcl rcr rct rcu rga rgb rgc rgg rgr rgt rla rlc rlg rll rlr rlt rlu rra rrb rrc rrg rrl rrr rrt rru rta rtb rtc rtg rtl rtr rtt rtu rua rub ruc rug rur rut ruu taa tab tac tag tal tar tat tau tba tbb tbc tbg tbl tbr tbt tbu tca tcb tcc tcg tcl tcr tct tcu tga tgb tgc tgg tgl tgr tgt tgu tla tlc tlg tll tlr tlt tlu tra trb trc trg trl trr trt tru tta ttb ttc ttg ttl ttr ttt ttu tua tub tuc tug tul tur tut tuu ua- uaa uab uac uag ual uar uat uau uba ubb ubc ubg ubl ubr ubt ubu uca ucb ucc ucg ucl ucr uct ucu uga ugb ugc ugg ugl ugr ugt ugu ula ulb ulc ulg ull ulr ult ulu ur- ura urb urc urg url urr urt uru uta utb utc utl utr utt utu uua uuc uug uur uut uuu