-al -ol a-a a-b aaa aab aag aak aal aao aar ab- aba abb abg abk abl abo abr ag- aga agb agg agk agl ago agr aka akb akg akk akl ako akr al- ala alb alg alk all alo alr aoa aob aog aok aol aoo aor ar- ara arb arg ark arl aro arr baa bab bag bak bal bao bar bba bbb bbg bbk bbl bbo bbr bga bgb bgg bgk bgl bgo bgr bka bkb bkg bkk bkl bko bkr bla blb blg blk bll blo blr boa bob bog bok bol boo bor bra brb brg brk brl bro brr gaa gab gag gak gal gao gar gba gbg gbk gbl gbo gbr gga ggb ggg ggo ggr gka gkb gko gla glb glg glk gll glo glr goa gob gog gok gol goo gor gra grb grg grk grl gro grr ka- kaa kab kag kak kal kao kar kba kbb kbk kbl kbo kbr kga kgb kgl kgo kkb kkk kkl kkr kl- kla klb klg klo klr koa kob kog kok kol koo kor kra krg krk krl kro krr la- laa lab lag lak lal lao lar lba lbb lbg lbk lbl lbo lbr lga lgb lgg lgk lgl lgo lgr lka lkb lkg lkl lkr lla llb llg llk lll llo llr loa lob log lok lol loo lor lra lrb lrg lrk lro lrr oaa oab oag oak oal oao oar ob- oba obb obg obk obl obo obr oga ogg ogl ogo oka okb okg okk okl oko okr ola olb olg olk oll olo oo- ooa oob oog ook ool ooo oor or- ora orb org ork orl oro orr ra- raa rab rag rak ral rao rar rba rbb rbg rbk rbl rbo rbr rga rgb rgg rgk rgo rgr rkb rkg rkk rko rla rlg rll rlo rlr roa rob rog rok rol roo ror rra rrb rrg rrk rrl rrr