-ol fff ffg ffk ffl ffn ffo ffs fgf fgg fgl fgn fgs fkf fkg fkk fkl flf flg fll fln flo fls fnf fng fnk fnl fnn fns fof fog fok fol fon foo fos fsf fsg fsk fsl fsn fso fss gff gfk gfl gfo gfs ggg ggn ggo ggs gkn gko gks glf glg glk gll gln glo gls gnf gnl gnn gno gns gof gog gok gol gon goo gos gsf gsg gsk gsl gsn gso gss kff kfg kfo kfs kgf kgl kgo kgs kkk kkl kkn kks kl- klf klg klo kls kn- knf kng knk knl knn kno kof kog kok kol kon koo kos ksf ksg ksk ksl ksn kso kss lff lfg lfk lfl lfn lfo lfs lgf lgg lgk lgl lgn lgo lgs lkg lkl lks llf llg llk lll lln llo lls lng lnk lnl lnn lno lns lof log lok lol lon loo los lsf lsg lsk lsl lsn lso lss nff nfk nfl nfn nfo nfs ngf ngg ngk ngl ngn ngo ngs nkf nkk nkn nko nks nlf nlg nlk nll nln nlo nls nnf nng nnk nnl nnn nno nns no- nof nog nok nol non noo nos nsf nsg nsk nsl nsn nso nss of- off ofg ofl ofn ofo ofs ogf ogg ogl ogn ogo ogs okg okk okl oko oks olf olg olk oll oln olo ols on- onf ong onk onl onn ono ons oo- oof oog ook ool oon ooo oos os- osf osg osk osl osn oso oss sff sfg sfk sfl sfn sfo sfs sgf sgg sgk sgl sgn sgo sgs sk- skf skg skk skl sko sks slf slg slk sll sln slo sls snf sng snk snl snn sno sns sof sog sok sol son soo sos ss- ssf ssg ssk ssl ssn sso sss