-al a-a a-b aaa aab aae aag aal aan aas ab- aba abb abe abg abl abn abs aea aeb aee aeg ael aen aes ag- aga agb age agg agl agn ags al- ala alb ale alg all aln als an- ana anb ane ang anl ann ans as- asa asb ase asg asl asn ass baa bab bae bag bal ban bas bba bbb bbe bbg bbl bbn bbs be- bea beb bee beg bel ben bes bga bgb bge bgg bgl bgn bgs bla blb ble blg bll bln bls bna bnb bne bng bnl bnn bns bsa bsb bse bsg bsl bsn bss eaa eab eae eag eal ean eas eba ebb ebe ebg ebl ebn ebs eea eeb eee eeg eel een ees ega egb ege egg egl egn egs ela elb ele elg ell eln els en- ena enb ene eng enl enn ens es- esa esb ese esg esl esn ess gaa gab gae gag gal gan gas gba gbe gbg gbl gbn gbs ge- gea geb gee geg gel gen ges gga ggb ggg ggn ggs gla glb gle glg gll gln gls gna gnb gne gnl gnn gns gsa gsb gse gsg gsl gsn gss la- laa lab lae lag lal lan las lba lbb lbe lbg lbl lbs lea leb lee leg lel len les lga lgb lge lgg lgl lgn lgs lla llb lle llg lll lln lls lna lnb lne lng lnl lnn lns lsa lsb lse lsg lsl lsn lss naa nab nae nag nal nan nas nba nbb nbe nbg nbl nbn nbs ne- nea neb nee neg nel nen nes nga ngb nge ngg ngl ngn ngs nla nlb nle nlg nll nln nls nna nnb nne nng nnl nnn nns nsa nsb nse nsg nsl nsn nss saa sab sae sag sal san sas sba sbb sbe sbg sbl sbn sbs se- sea seb see seg sel sen ses sga sgb sge sgg sgl sgn sgs sla slb sle slg sll sln sls sna snb sne sng snl snn sns ss- ssa ssb sse ssg ssl ssn sss