-al -er a-a a-b a-c a-t aaa aab aac aae aag aal aar aas aat ab- aba abb abc abe abg abl abr abs abt ac- aca acb acc ace acg acl acr acs act aea aeb aec aee aeg ael aer aes aet ag- aga agb agc age agg agl agr ags agt al- ala alb alc ale alg all alr als alt ar- ara arb arc are arg arl arr ars art as- asa asb asc ase asg asl asr ass ast at- ata atb atc ate atg atl atr ats att baa bab bac bae bag bal bar bas bat bba bbb bbc bbe bbg bbl bbr bbs bbt bca bcb bcc bce bcg bcl bcr bcs bct be- bea beb bec bee beg bel ber bes bet bga bgb bgc bge bgg bgl bgr bgs bgt bla blb blc ble blg bll blr bls blt bra brb bre brg brl brr brs brt bsa bsb bsc bse bsg bsl bsr bss bst bta btb btc bte btg btl btr bts btt c-- caa cab cac cae cag cal car cas cat cba cbb cbc cbe cbg cbl cbr cbs cbt cca ccb ccc cce ccg ccl ccr ccs cct ce- cea ceb cec cee ceg cel cer ces cet cga cgb cgc cge cgg cgl cgr cgs cgt cl- cla clb clc cle clg cll clr cls clt cra crb crc cre crg crl crr crs crt csa csb csc cse csg csl csr css cst cta ctb ctc cte ctg ctl ctr cts ctt eaa eab eac eae eag eal ear eas eat eba ebb ebc ebe ebg ebl ebr ebs ebt ec- eca ecb ecc ece ecg ecl ecr ecs ect eea eeb eec eee eeg eel eer ees eet ega egb egc ege egg egl egr egs egt ela elb elc ele elg ell elr els elt era erb erc ere erg erl err ers ert es- esa esb esc ese esg esl esr ess est eta etb etc ete etg etl etr ets ett gaa gab gac gae gag gal gar gas gat gba gbc gbe gbg gbl gbr gbs gbt gca gcb gcc gce gcg gcl gcr gcs gct ge- gea geb gec gee geg gel ger ges get gga ggb ggc ggg ggr ggs ggt gla glb glc gle glg gll glr gls glt gra grb grc gre grg grl grr grs grt gsa gsb gsc gse gsg gsl gsr gss gst gta gtb gtc gte gtg gtl gtr gts gtt la- laa lab lac lae lag lal lar las lat lba lbb lbc lbe lbg lbl lbr lbs lbt lca lcb lcc lce lcg lcl lcr lcs lct lea leb lec lee leg lel ler les let lga lgb lgc lge lgg lgl lgr lgs lgt lla llb llc lle llg lll llr lls llt lra lrb lrc lrg lrr lrs lrt lsa lsb lsc lse lsg lsl lsr lss lst lta ltb ltc lte ltg ltl ltr lts ltt ra- raa rab rac rae rag ral rar ras rat rba rbb rbc rbe rbg rbl rbr rbs rbt rca rcb rcc rce rcg rcl rcr rcs rct re- rea reb rec ree reg rel rer res ret rga rgb rgc rge rgg rgr rgs rgt rla rlc rle rlg rll rlr rls rlt rra rrb rrc rrg rrl rrr rrs rrt rsa rsb rsc rse rsg rsl rsr rss rst rta rtb rtc rte rtg rtl rtr rts rtt saa sab sac sae sag sal sar sas sat sba sbb sbc sbe sbg sbl sbr sbs sbt sca scb scc sce scg scl scr scs sct se- sea seb sec see seg sel ser ses set sga sgb sgc sge sgg sgl sgr sgs sgt sla slb slc sle slg sll slr sls slt sr- sra srb src sre srg srl srr srs srt ss- ssa ssb ssc sse ssg ssl ssr sss sst sta stb stc ste stg stl str sts stt taa tab tac tae tag tal tar tas tat tba tbb tbc tbe tbg tbl tbr tbs tbt tca tcb tcc tce tcg tcl tcr tcs tct te- tea teb tec tee teg tel ter tes tet tga tgb tgc tge tgg tgl tgr tgs tgt tla tlc tle tlg tll tlr tls tlt tra trb trc tre trg trl trr trs trt tsa tsb tsc tse tsg tsl tsr tss tst tta ttb ttc tte ttg ttl ttr tts ttt