-al -ol a-a a-b a-i aaa aab aai aak aal aao ab- aba abb abi abk abl abo ai- aia aib aii aik ail aio aka akb aki akk akl ako al- ala alb ali alk all alo aoa aob aoi aok aol aoo baa bab bai bak bal bao bba bbb bbi bbk bbl bbo bi- bia bib bii bik bil bio bka bkb bkk bkl bko bla blb bli blk bll blo boa bob boi bok bol boo ia- iaa iab iai ial iao iba ibb ibi ibk ibl ibo iia iib iii iil iio ika ikb iki ikk ikl iko il- ila ilb ili ilk ill ilo io- ioa iob ioi iol ioo ka- kaa kab kai kak kal kao kba kbb kbi kbk kbl kbo kia kib kii kik kil kio kkb kki kkk kkl kl- kla klb kli klo koa kob koi kok kol koo la- laa lab lai lak lal lao lba lbb lbi lbk lbl lbo lia lib lii lik lil lio lka lkb lkl lla llb lli llk lll llo loa lob loi lok lol loo o-i oaa oab oai oak oal oao ob- oba obb obi obk obl obo oia oib oii oik oil oio oka okb oki okk okl oko ola olb oli olk oll olo oo- ooa oob ooi ook ool ooo