-al -ol a-a a-b a-i aaa aab aai aak aal aao aar ab- aba abb abi abk abl abo abr ai- aia aib aii aik ail aio air aka akb aki akk akl ako akr al- ala alb ali alk all alo alr aoa aob aoi aok aol aoo aor ar- ara arb ari ark arl aro arr baa bab bai bak bal bao bar bba bbb bbi bbk bbl bbo bbr bi- bia bib bii bik bil bio bir bka bkb bkk bkl bko bkr bla blb bli blk bll blo blr boa bob boi bok bol boo bor bra brb bri brk brl bro brr ia- iaa iab iai ial iao iar iba ibb ibi ibk ibl ibo ibr iia iib iii iil iio iir ika ikb iki ikk ikl iko ikr il- ila ilb ili ilk ill ilo ilr io- ioa iob ioi iol ioo ior ir- ira irb iri irk irl iro irr ka- kaa kab kai kak kal kao kar kba kbb kbi kbk kbl kbo kbr kia kib kii kik kil kio kir kkb kki kkk kkl kkr kl- kla klb kli klo klr koa kob koi kok kol koo kor kra kri krk krl kro krr la- laa lab lai lak lal lao lar lba lbb lbi lbk lbl lbo lbr lia lib lii lik lil lio lir lka lkb lkl lkr lla llb lli llk lll llo llr loa lob loi lok lol loo lor lra lrb lri lrk lro lrr o-i oaa oab oai oak oal oao oar ob- oba obb obi obk obl obo obr oia oib oii oik oil oio oir oka okb oki okk okl oko okr ola olb oli olk oll olo oo- ooa oob ooi ook ool ooo oor or- ora orb ori ork orl oro orr ra- raa rab rai rak ral rao rar rba rbb rbi rbk rbl rbo rbr ria rib rii rik ril rio rir rkb rkk rko rla rli rll rlo rlr roa rob roi rok rol roo ror rra rrb rri rrk rrl rrr