-al -ol a-a a-b aaa aab aal aam aao aar ab- aba abb abl abm abo abr al- ala alb all alm alo alr ama amb aml amm amo amr aoa aob aol aom aoo aor ar- ara arb arl arm aro arr baa bab bal bam bao bar bba bbb bbl bbm bbo bbr bla blb bll blm blo blr bma bmb bml bmm bmo bmr boa bob bol bom boo bor bra brb brl brm bro brr la- laa lab lal lam lao lar lba lbb lbl lbm lbo lbr lla llb lll llm llo llr lma lmb lml lmm lmo lmr loa lob lol lom loo lor lra lrb lrm lro lrr m-o m-r maa mab mal mam mao mar mba mbb mbl mbm mbo mbr mla mlb mll mlm mlo mlr mma mmb mml mmm mmo mmr moa mob mol mom moo mor mra mrb mrl mrm mro mrr oaa oab oal oam oao oar ob- oba obb obl obm obo obr ola olb oll olm olo om- oma omb oml omm omo omr oo- ooa oob ool oom ooo oor or- ora orb orl orm oro orr ra- raa rab ral ram rao rar rba rbb rbl rbm rbo rbr rla rll rlm rlo rlr rma rmb rml rmm rmo rmr roa rob rol rom roo ror rra rrb rrl rrm rrr