-al -er a-a a-b aaa aab aae aaf aag aal aam aar ab- aba abb abe abf abg abl abm abr aea aeb aee aef aeg ael aem aer af- afa afb afe aff afg afl afm afr ag- aga agb age agf agg agl agm agr al- ala alb ale alf alg all alm alr ama amb ame amf amg aml amm amr ar- ara arb are arf arg arl arm arr baa bab bae baf bag bal bam bar bba bbb bbe bbf bbg bbl bbm bbr be- bea beb bee bef beg bel bem ber bfa bfb bfe bff bfg bfl bfm bfr bga bgb bge bgf bgg bgl bgm bgr bla blb ble blf blg bll blm blr bma bmb bme bmf bmg bml bmm bmr bra brb bre brf brg brl brm brr eaa eab eae eaf eag eal eam ear eba ebb ebe ebf ebg ebl ebm ebr eea eeb eee eef eeg eel eem eer ef- efa efb efe eff efg efl efm efr ega egb ege egf egg egl egm egr ela elb ele elf elg ell elm elr em- ema emb eme emf emg eml emm emr era erb ere erf erg erl erm err faa fab fae faf fag fal fam far fba fbb fbe fbf fbg fbl fbm fbr fea feb fee fef feg fel fem fer ffa ffe fff ffg ffl ffm ffr fga fgb fge fgf fgg fgl fgm fgr fla flb fle flf flg fll flm flr fma fmb fme fmf fmg fml fmm fmr fra frb fre frf frg frl frm frr gaa gab gae gaf gag gal gam gar gba gbe gbf gbg gbl gbm gbr ge- gea geb gee gef geg gel gem ger gfa gfb gfe gff gfl gfm gfr gga ggb ggg ggm ggr gla glb gle glf glg gll glm glr gma gmb gme gmf gmg gml gmm gmr gra grb gre grf grg grl grm grr la- laa lab lae laf lag lal lam lar lba lbb lbe lbf lbg lbl lbm lbr lea leb lee lef leg lel lem ler lfa lfb lfe lff lfg lfl lfm lfr lga lgb lge lgf lgg lgl lgm lgr lla llb lle llf llg lll llm llr lma lmb lme lmf lmg lml lmm lmr lra lrb lrf lrg lrm lrr m-f m-r maa mab mae maf mag mal mam mar mba mbb mbe mbf mbg mbl mbm mbr mea meb mee mef meg mel mem mer mfa mfb mfe mff mfg mfl mfm mfr mga mgb mge mgf mgl mgm mgr mla mlb mle mlf mlg mll mlm mlr mma mmb mme mmf mmg mml mmm mmr mra mrb mre mrf mrg mrl mrm mrr ra- raa rab rae raf rag ral ram rar rba rbb rbe rbf rbg rbl rbm rbr re- rea reb ree ref reg rel rem rer rfa rfb rfe rff rfg rfl rfm rfr rga rgb rge rgf rgg rgr rla rle rlf rlg rll rlm rlr rma rmb rme rmf rmg rml rmm rmr rra rrb rrf rrg rrl rrm rrr