-al -ol a-a a-b aaa aab aag aak aal aao aar aas ab- aba abb abg abk abl abo abr abs ag- aga agb agg agk agl ago agr ags aka akb akg akk akl ako akr aks al- ala alb alg alk all alo alr als aoa aob aog aok aol aoo aor aos ar- ara arb arg ark arl aro arr ars as- asa asb asg ask asl aso asr ass baa bab bag bak bal bao bar bas bba bbb bbg bbk bbl bbo bbr bbs bga bgb bgg bgk bgl bgo bgr bgs bka bkb bkg bkk bkl bko bkr bks bla blb blg blk bll blo blr bls boa bob bog bok bol boo bor bos bra brb brg brk brl bro brr brs bsa bsb bsg bsk bsl bso bsr bss gaa gab gag gak gal gao gar gas gba gbg gbk gbl gbo gbr gbs gga ggb ggg ggo ggr ggs gka gkb gko gks gla glb glg glk gll glo glr gls goa gob gog gok gol goo gor gos gra grb grg grk grl gro grr grs gsa gsb gsg gsk gsl gso gsr gss ka- kaa kab kag kak kal kao kar kas kba kbb kbk kbl kbo kbr kbs kga kgb kgl kgo kgs kkb kkk kkl kkr kks kl- kla klb klg klo klr kls koa kob kog kok kol koo kor kos kra krg krk krl kro krr krs ksa ksb ksg ksk ksl kso ksr kss la- laa lab lag lak lal lao lar las lba lbb lbg lbk lbl lbo lbr lbs lga lgb lgg lgk lgl lgo lgr lgs lka lkb lkg lkl lkr lks lla llb llg llk lll llo llr lls loa lob log lok lol loo lor los lra lrb lrg lrk lro lrr lrs lsa lsb lsg lsk lsl lso lsr lss oaa oab oag oak oal oao oar oas ob- oba obb obg obk obl obo obr obs oga ogg ogl ogo ogs oka okb okg okk okl oko okr oks ola olb olg olk oll olo ols oo- ooa oob oog ook ool ooo oor oos or- ora orb org ork orl oro orr ors os- osa osb osg osk osl oso osr oss ra- raa rab rag rak ral rao rar ras rba rbb rbg rbk rbl rbo rbr rbs rga rgb rgg rgk rgo rgr rgs rkb rkg rkk rko rks rla rlg rll rlo rlr rls roa rob rog rok rol roo ror ros rra rrb rrg rrk rrl rrr rrs rsa rsb rsg rsk rsl rso rsr rss saa sab sag sak sal sao sar sas sba sbb sbg sbk sbl sbo sbr sbs sga sgb sgg sgk sgl sgo sgr sgs sk- ska skb skg skk skl sko skr sks sla slb slg slk sll slo slr sls soa sob sog sok sol soo sor sos sr- sra srb srg srk srl sro srr srs ss- ssa ssb ssg ssk ssl sso ssr sss