-al -er a-a a-b a-c a-t aaa aab aac aae aag aal aan aar aas aat aau ab- aba abb abc abe abg abl abn abr abs abt abu ac- aca acb acc ace acg acl acn acr acs act acu aea aeb aec aee aeg ael aen aer aes aet aeu ag- aga agb agc age agg agl agn agr ags agt agu al- ala alb alc ale alg all aln alr als alt alu an- ana anb anc ane ang anl ann anr ans ant anu ar- ara arb arc are arg arl arn arr ars art aru as- asa asb asc ase asg asl asn asr ass ast asu at- ata atb atc ate atg atl atn atr ats att atu au- aua aub auc aue aug aul aun aur aus aut b-u baa bab bac bae bag bal ban bar bas bat bau bba bbb bbc bbe bbg bbl bbn bbr bbs bbt bbu bca bcb bcc bce bcg bcl bcn bcr bcs bct bcu be- bea beb bec bee beg bel ben ber bes bet beu bga bgb bgc bge bgg bgl bgn bgr bgs bgt bgu bla blb blc ble blg bll bln blr bls blt blu bna bnb bnc bne bng bnl bnn bnr bns bnt bnu bra brb bre brg brl brn brr brs brt bru bsa bsb bsc bse bsg bsl bsn bsr bss bst bsu bta btb btc bte btg btl btn btr bts btt btu bua bub buc bue bug bul bun bur bus but buu c-- caa cab cac cae cag cal can car cas cat cau cba cbb cbc cbe cbg cbl cbn cbr cbs cbt cbu cca ccb ccc cce ccg ccl ccn ccr ccs cct ccu ce- cea ceb cec cee ceg cel cen cer ces cet ceu cga cgb cgc cge cgg cgl cgn cgr cgs cgt cgu cl- cla clb clc cle clg cll cln clr cls clt clu cn- cna cnb cnc cne cng cnl cnn cnr cns cnt cnu cra crb crc cre crg crl crn crr crs crt cru csa csb csc cse csg csl csn csr css cst csu cta ctb ctc cte ctg ctl ctn ctr cts ctt ctu cua cub cuc cue cug cul cun cur cus cut cuu eaa eab eac eae eag eal ean ear eas eat eau eba ebb ebc ebe ebg ebl ebn ebr ebs ebt ebu ec- eca ecb ecc ece ecg ecl ecn ecr ecs ect ecu eea eeb eec eee eeg eel een eer ees eet ega egb egc ege egg egl egn egr egs egt egu ela elb elc ele elg ell eln elr els elt elu en- ena enb enc ene eng enl enn enr ens ent enu era erb erc ere erg erl ern err ers ert eru es- esa esb esc ese esg esl esn esr ess est esu eta etb etc ete etg etl etn etr ets ett etu eu- eua eub euc eue eug eul eun eur eus eut gaa gab gac gae gag gal gan gar gas gat gau gba gbc gbe gbg gbl gbn gbr gbs gbt gbu gca gcb gcc gce gcg gcl gcn gcr gcs gct gcu ge- gea geb gec gee geg gel gen ger ges get geu gga ggb ggc ggg ggn ggr ggs ggt ggu gla glb glc gle glg gll gln glr gls glt glu gna gnb gnc gne gnl gnn gnr gns gnt gnu gra grb grc gre grg grl grn grr grs grt gru gsa gsb gsc gse gsg gsl gsn gsr gss gst gsu gta gtb gtc gte gtg gtl gtn gtr gts gtt gtu gu- gua gub guc gue gug gul gun gur gus gut guu la- laa lab lac lae lag lal lan lar las lat lau lba lbb lbc lbe lbg lbl lbr lbs lbt lbu lca lcb lcc lce lcg lcl lcn lcr lcs lct lcu lea leb lec lee leg lel len ler les let leu lga lgb lgc lge lgg lgl lgn lgr lgs lgt lgu lla llb llc lle llg lll lln llr lls llt llu lna lnb lnc lne lng lnl lnn lnr lns lnt lnu lra lrb lrc lrg lrn lrr lrs lrt lru lsa lsb lsc lse lsg lsl lsn lsr lss lst lsu lta ltb ltc lte ltg ltl ltr lts ltt ltu lua lub luc lue lug lul lun lur lus lut luu naa nab nac nae nag nal nan nar nas nat nau nba nbb nbc nbe nbg nbl nbn nbr nbs nbt nbu nca ncb ncc nce ncg ncl ncn ncr ncs nct ncu ne- nea neb nec nee neg nel nen ner nes net neu nga ngb ngc nge ngg ngl ngn ngs ngt ngu nla nlb nlc nle nlg nll nln nlr nls nlt nlu nna nnb nnc nne nng nnl nnn nns nnt nnu nra nrb nrc nre nrg nrl nrn nrr nrs nrt nru nsa nsb nsc nse nsg nsl nsn nsr nss nst nsu nta ntb ntc nte ntg ntn ntr nts ntt ntu nua nub nuc nue nug nul nun nur nus nut nuu ra- raa rab rac rae rag ral ran rar ras rat rau rba rbb rbc rbe rbg rbl rbn rbr rbs rbt rbu rca rcb rcc rce rcg rcl rcn rcr rcs rct rcu re- rea reb rec ree reg rel ren rer res ret reu rga rgb rgc rge rgg rgn rgr rgs rgt rla rlc rle rlg rll rln rlr rls rlt rlu rna rnb rnc rng rnn rnr rns rnt rnu rra rrb rrc rrg rrl rrn rrr rrs rrt rru rsa rsb rsc rse rsg rsl rsn rsr rss rst rsu rta rtb rtc rte rtg rtl rtn rtr rts rtt rtu rua rub ruc rue rug run rur rus rut ruu saa sab sac sae sag sal san sar sas sat sau sba sbb sbc sbe sbg sbl sbn sbr sbs sbt sbu sca