-al -er a-a a-b a-c a-t aaa aab aac aae aag aal aar aas aat aau ab- aba abb abc abe abg abl abr abs abt abu ac- aca acb acc ace acg acl acr acs act acu aea aeb aec aee aeg ael aer aes aet aeu ag- aga agb agc age agg agl agr ags agt agu al- ala alb alc ale alg all alr als alt alu ar- ara arb arc are arg arl arr ars art aru as- asa asb asc ase asg asl asr ass ast asu at- ata atb atc ate atg atl atr ats att atu au- aua aub auc aue aug aul aur aus aut b-u baa bab bac bae bag bal bar bas bat bau bba bbb bbc bbe bbg bbl bbr bbs bbt bbu bca bcb bcc bce bcg bcl bcr bcs bct bcu be- bea beb bec bee beg bel ber bes bet beu bga bgb bgc bge bgg bgl bgr bgs bgt bgu bla blb blc ble blg bll blr bls blt blu bra brb bre brg brl brr brs brt bru bsa bsb bsc bse bsg bsl bsr bss bst bsu bta btb btc bte btg btl btr bts btt btu bua bub buc bue bug bul bur bus but buu c-- caa cab cac cae cag cal car cas cat cau cba cbb cbc cbe cbg cbl cbr cbs cbt cbu cca ccb ccc cce ccg ccl ccr ccs cct ccu ce- cea ceb cec cee ceg cel cer ces cet ceu cga cgb cgc cge cgg cgl cgr cgs cgt cgu cl- cla clb clc cle clg cll clr cls clt clu cra crb crc cre crg crl crr crs crt cru csa csb csc cse csg csl csr css cst csu cta ctb ctc cte ctg ctl ctr cts ctt ctu cua cub cuc cue cug cul cur cus cut cuu eaa eab eac eae eag eal ear eas eat eau eba ebb ebc ebe ebg ebl ebr ebs ebt ebu ec- eca ecb ecc ece ecg ecl ecr ecs ect ecu eea eeb eec eee eeg eel eer ees eet ega egb egc ege egg egl egr egs egt egu ela elb elc ele elg ell elr els elt elu era erb erc ere erg erl err ers ert eru es- esa esb esc ese esg esl esr ess est esu eta etb etc ete etg etl etr ets ett etu eu- eua eub euc eue eug eul eur eus eut gaa gab gac gae gag gal gar gas gat gau gba gbc gbe gbg gbl gbr gbs gbt gbu gca gcb gcc gce gcg gcl gcr gcs gct gcu ge- gea geb gec gee geg gel ger ges get geu gga ggb ggc ggg ggr ggs ggt ggu gla glb glc gle glg gll glr gls glt glu gra grb grc gre grg grl grr grs grt gru gsa gsb gsc gse gsg gsl gsr gss gst gsu gta gtb gtc gte gtg gtl gtr gts gtt gtu gu- gua gub guc gue gug gul gur gus gut guu la- laa lab lac lae lag lal lar las lat lau lba lbb lbc lbe lbg lbl lbr lbs lbt lbu lca lcb lcc lce lcg lcl lcr lcs lct lcu lea leb lec lee leg lel ler les let leu lga lgb lgc lge lgg lgl lgr lgs lgt lgu lla llb llc lle llg lll llr lls llt llu lra lrb lrc lrg lrr lrs lrt lru lsa lsb lsc lse lsg lsl lsr lss lst lsu lta ltb ltc lte ltg ltl ltr lts ltt ltu lua lub luc lue lug lul lur lus lut luu ra- raa rab rac rae rag ral rar ras rat rau rba rbb rbc rbe rbg rbl rbr rbs rbt rbu rca rcb rcc rce rcg rcl rcr rcs rct rcu re- rea reb rec ree reg rel rer res ret reu rga rgb rgc rge rgg rgr rgs rgt rla rlc rle rlg rll rlr rls rlt rlu rra rrb rrc rrg rrl rrr rrs rrt rru rsa rsb rsc rse rsg rsl rsr rss rst rsu rta rtb rtc rte rtg rtl rtr rts rtt rtu rua rub ruc rue rug rur rus rut ruu saa sab sac sae sag sal sar sas sat sau sba sbb sbc sbe sbg sbl sbr sbs sbt sbu sca scb scc sce scg scl scr scs sct scu se- sea seb sec see seg sel ser ses set seu sga sgb sgc sge sgg sgl sgr sgs sgt sgu sla slb slc sle slg sll slr sls slt slu sr- sra srb src sre srg srl srr srs srt ss- ssa ssb ssc sse ssg ssl ssr sss sst ssu sta stb stc ste stg stl str sts stt stu sua sub suc sue sug sul sur sus sut suu taa tab tac tae tag tal tar tas tat tau tba tbb tbc tbe tbg tbl tbr tbs tbt tbu tca tcb tcc tce tcg tcl tcr tcs tct tcu te- tea teb tec tee teg tel ter tes tet teu tga tgb tgc tge tgg tgl tgr tgs tgt tgu tla tlc tle tlg tll tlr tls tlt tlu tra trb trc tre trg trl trr trs trt tru tsa tsb tsc tse tsg tsl tsr tss tst tsu tta ttb ttc tte ttg ttl ttr tts ttt ttu tua tub tuc tue tug tul tur tus tut tuu ua- uaa uab uac uae uag ual uar uas uat uau uba ubb ubc ube ubg ubl ubr ubs ubt ubu uca ucb ucc uce ucg ucl ucr ucs uct ucu uea ueb uec uee ueg uel uer ues uet uga ugb ugc uge ugg ugl ugr ugs ugt ugu ula ulb ulc ule ulg ull ulr uls ult ulu ur- ura urb urc ure urg url urr urs urt uru usa usb usc use usg usl usr uss ust usu uta utb utc ute