-al -ol a-a a-b aaa aab aal aam aao aar aas ab- aba abb abl abm abo abr abs al- ala alb all alm alo alr als ama amb aml amm amo amr ams aoa aob aol aom aoo aor aos ar- ara arb arl arm aro arr ars as- asa asb asl asm aso asr ass baa bab bal bam bao bar bas bba bbb bbl bbm bbo bbr bbs bla blb bll blm blo blr bls bma bmb bml bmm bmo bmr bms boa bob bol bom boo bor bos bra brb brl brm bro brr brs bsa bsb bsl bsm bso bsr bss la- laa lab lal lam lao lar las lba lbb lbl lbm lbo lbr lbs lla llb lll llm llo llr lls lma lmb lml lmm lmo lmr lms loa lob lol lom loo lor los lra lrb lrm lro lrr lrs lsa lsb lsl lsm lso lsr lss m-o m-r maa mab mal mam mao mar mas mba mbb mbl mbm mbo mbr mbs mla mlb mll mlm mlo mlr mls mma mmb mml mmm mmo mmr mms moa mob mol mom moo mor mos mra mrb mrl mrm mro mrr mrs msa msb msl msm mso msr mss oaa oab oal oam oao oar oas ob- oba obb obl obm obo obr obs ola olb oll olm olo ols om- oma omb oml omm omo omr oms oo- ooa oob ool oom ooo oor oos or- ora orb orl orm oro orr ors os- osa osb osl osm oso osr oss ra- raa rab ral ram rao rar ras rba rbb rbl rbm rbo rbr rbs rla rll rlm rlo rlr rls rma rmb rml rmm rmo rmr rms roa rob rol rom roo ror ros rra rrb rrl rrm rrr rrs rsa rsb rsl rsm rso rsr rss saa sab sal sam sao sar sas sba sbb sbl sbm sbo sbr sbs sla slb sll slm slo slr sls sma smb sml smm smo smr sms soa sob sol som soo sor sos sr- sra srb srl srm sro srr srs ss- ssa ssb ssl ssm sso ssr sss