-al -ol a-a a-b a-c aaa aab aac aal aam aao ab- aba abb abc abl abm abo ac- aca acb acc acl acm aco al- ala alb alc all alm alo ama amb amc aml amm amo aoa aob aoc aol aom aoo baa bab bac bal bam bao bba bbb bbc bbl bbm bbo bca bcb bcc bcl bcm bco bla blb blc bll blm blo bma bmb bmc bml bmm bmo boa bob boc bol bom boo c-- caa cab cac cal cam cao cba cbb cbc cbl cbm cbo cca ccb ccc ccl ccm cco cl- cla clb clc cll clm clo cma cmb cmc cml cmm cmo co- coa cob coc col com coo la- laa lab lac lal lam lao lba lbb lbc lbl lbm lbo lca lcb lcc lcl lcm lco lla llb llc lll llm llo lma lmb lmc lml lmm lmo loa lob loc lol lom loo m-o maa mab mac mal mam mao mba mbb mbc mbl mbm mbo mc- mca mcb mcc mcl mcm mco mla mlb mlc mll mlm mlo mma mmb mmc mml mmm mmo moa mob moc mol mom moo oaa oab oac oal oam oao ob- oba obb obc obl obm obo oc- oca ocb occ ocl ocm oco ola olb olc oll olm olo om- oma omb omc oml omm omo oo- ooa oob ooc ool oom ooo