-al -ol a-a a-b a-i aaa aab aae aai aak aal aao ab- aba abb abe abi abk abl abo aea aeb aee aei aek ael aeo ai- aia aib aie aii aik ail aio aka akb ake aki akk akl ako al- ala alb ale ali alk all alo aoa aob aoe aoi aok aol aoo baa bab bae bai bak bal bao bba bbb bbe bbi bbk bbl bbo be- bea beb bee bei bek bel beo bi- bia bib bie bii bik bil bio bka bkb bke bkk bkl bko bla blb ble bli blk bll blo boa bob boe boi bok bol boo eaa eab eae eai eak eal eao eba ebb ebe ebi ebk ebl ebo eea eeb eee eek eel eeo eia eib eie eii eik eil eio eka ekb eke eki ekl eko ela elb ele eli elk ell elo eo- eoa eob eoe eoi eok eol eoo ia- iaa iab iae iai ial iao iba ibb ibe ibi ibk ibl ibo ie- iea iee iei iek iel iia iib iie iii iil iio ika ikb ike iki ikk ikl iko il- ila ilb ile ili ilk ill ilo io- ioa iob ioe ioi iol ioo ka- kaa kab kae kai kak kal kao kba kbb kbe kbi kbk kbl kbo ke- kea keb kee kei kek kel keo kia kib kie kii kik kil kio kkb kke kki kkk kkl kl- kla klb kli klo koa kob koe koi kok kol koo la- laa lab lae lai lak lal lao lba lbb lbe lbi lbk lbl lbo lea leb lee lei lek lel leo lia lib lie lii lik lil lio lka lkb lkl lla llb lle lli llk lll llo loa lob loe loi lok lol loo o-i oaa oab oae oai oak oal oao ob- oba obb obe obi obk obl obo oea oeb oee oei oel oeo oia oib oie oii oik oil oio oka okb oke oki okk okl oko ola olb ole oli olk oll olo oo- ooa oob ooi ook ool ooo