-al -ol a-a a-b aaa aab aae aak aal aao ab- aba abb abe abk abl abo aea aeb aee aek ael aeo aka akb ake akk akl ako al- ala alb ale alk all alo aoa aob aoe aok aol aoo baa bab bae bak bal bao bba bbb bbe bbk bbl bbo be- bea beb bee bek bel beo bka bkb bke bkk bkl bko bla blb ble blk bll blo boa bob boe bok bol boo eaa eab eae eak eal eao eba ebb ebe ebk ebl ebo eea eeb eee eek eel eeo eka ekb eke ekl eko ela elb ele elk ell elo eo- eoa eob eoe eok eol eoo ka- kaa kab kae kak kal kao kba kbb kbe kbk kbl kbo ke- kea keb kee kek kel keo kkb kke kkk kkl kl- kla klb klo koa kob koe kok kol koo la- laa lab lae lak lal lao lba lbb lbe lbk lbl lbo lea leb lee lek lel leo lka lkb lkl lla llb lle llk lll llo loa lob loe lok lol loo oaa oab oae oak oal oao ob- oba obb obe obk obl obo oea oeb oee oel oeo oka okb oke okk okl oko ola olb ole olk oll olo oo- ooa oob ook ool ooo