-al -ol a-a a-b aaa aab aal aam aao ab- aba abb abl abm abo al- ala alb all alm alo ama amb aml amm amo aoa aob aol aom aoo baa bab bal bam bao bba bbb bbl bbm bbo bla blb bll blm blo bma bmb bml bmm bmo boa bob bol bom boo la- laa lab lal lam lao lba lbb lbl lbm lbo lla llb lll llm llo lma lmb lml lmm lmo loa lob lol lom loo m-o maa mab mal mam mao mba mbb mbl mbm mbo mla mlb mll mlm mlo mma mmb mml mmm mmo moa mob mol mom moo oaa oab oal oam oao ob- oba obb obl obm obo ola olb oll olm olo om- oma omb oml omm omo oo- ooa oob ool oom ooo