-al a-a a-b a-c aaa aab aac aag aak aal aan aas ab- aba abb abc abg abk abl abn abs ac- aca acb acc acg ack acl acn acs ag- aga agb agc agg agk agl agn ags aka akb akc akg akk akl akn aks al- ala alb alc alg alk all aln als an- ana anb anc ang ank anl ann ans as- asa asb asc asg ask asl asn ass baa bab bac bag bak bal ban bas bba bbb bbc bbg bbk bbl bbn bbs bca bcb bcc bcg bck bcl bcn bcs bga bgb bgc bgg bgk bgl bgn bgs bka bkb bkc bkg bkk bkl bkn bks bla blb blc blg blk bll bln bls bna bnb bnc bng bnk bnl bnn bns bsa bsb bsc bsg bsk bsl bsn bss c-- caa cab cac cag cak cal can cas cba cbb cbc cbg cbk cbl cbn cbs cca ccb ccc ccg cck ccl ccn ccs cga cgb cgc cgg cgl cgn cgs cka ckb ckc cks cl- cla clb clc clg clk cll cln cls cn- cna cnb cnc cng cnl cnn cns csa csb csc csg csk csl csn css gaa gab gac gag gak gal gan gas gba gbc gbg gbk gbl gbn gbs gca gcb gcc gcg gck gcl gcn gcs gga ggb ggc ggg ggn ggs gka gkb gkn gks gla glb glc glg glk gll gln gls gna gnb gnc gnl gnn gns gsa gsb gsc gsg gsk gsl gsn gss ka- kaa kab kac kag kak kal kan kas kba kbb kbc kbk kbl kbn kbs kca kcb kcc kcg kck kcl kcn kcs kga kgb kgc kgl kgs kkb kkc kkk kkl kkn kks kl- kla klb klc klg kls kn- kna knc kng knk knl knn ksa ksb ksc ksg ksk ksl ksn kss la- laa lab lac lag lak lal lan las lba lbb lbc lbg lbk lbl lbs lca lcb lcc lcg lck lcl lcn lcs lga lgb lgc lgg lgk lgl lgn lgs lka lkb lkg lkl lks lla llb llc llg llk lll lln lls lna lnb lnc lng lnk lnl lnn lns lsa lsb lsc lsg lsk lsl lsn lss naa nab nac nag nak nal nan nas nba nbb nbc nbg nbk nbl nbn nbs nca ncb ncc ncg nck ncl ncn ncs nga ngb ngc ngg ngk ngl ngn ngs nka nkc nkk nkn nks nla nlb nlc nlg nlk nll nln nls nna nnb nnc nng nnk nnl nnn nns nsa nsb nsc nsg nsk nsl nsn nss saa sab sac sag sak sal san sas sba sbb sbc sbg sbk sbl sbn sbs sca scb scc scg sck scl scn scs sga sgb sgc sgg sgk sgl sgn sgs sk- ska skb skc skg skk skl sks sla slb slc slg slk sll sln sls sna snb snc sng snk snl snn sns ss- ssa ssb ssc ssg ssk ssl ssn sss