-al -ol a-a a-b aaa aab aaf aal aam aao aar aas ab- aba abb abf abl abm abo abr abs af- afa afb aff afl afm afo afr afs al- ala alb alf all alm alo alr als ama amb amf aml amm amo amr ams aoa aob aof aol aom aoo aor aos ar- ara arb arf arl arm aro arr ars as- asa asb asf asl asm aso asr ass baa bab baf bal bam bao bar bas bba bbb bbf bbl bbm bbo bbr bbs bfa bfb bff bfl bfm bfo bfr bfs bla blb blf bll blm blo blr bls bma bmb bmf bml bmm bmo bmr bms boa bob bof bol bom boo bor bos bra brb brf brl brm bro brr brs bsa bsb bsf bsl bsm bso bsr bss faa fab faf fal fam fao far fas fba fbb fbf fbl fbm fbo fbr fbs ffa fff ffl ffm ffo ffr ffs fla flb flf fll flm flo flr fls fma fmb fmf fml fmm fmo fmr fms foa fob fof fol fom foo for fos fra frb frf frl frm fro frr frs fsa fsb fsf fsl fsm fso fsr fss la- laa lab laf lal lam lao lar las lba lbb lbf lbl lbm lbo lbr lbs lfa lfb lff lfl lfm lfo lfr lfs lla llb llf lll llm llo llr lls lma lmb lmf lml lmm lmo lmr lms loa lob lof lol lom loo lor los lra lrb lrf lrm lro lrr lrs lsa lsb lsf lsl lsm lso lsr lss m-f m-o m-r maa mab maf mal mam mao mar mas mba mbb mbf mbl mbm mbo mbr mbs mfa mfb mff mfl mfm mfo mfr mfs mla mlb mlf mll mlm mlo mlr mls mma mmb mmf mml mmm mmo mmr mms moa mob mof mol mom moo mor mos mra mrb mrf mrl mrm mro mrr mrs msa msb msf msl msm mso msr mss oaa oab oaf oal oam oao oar oas ob- oba obb obf obl obm obo obr obs of- ofa ofb off ofl ofm ofo ofr ofs ola olb olf oll olm olo ols om- oma omb omf oml omm omo omr oms oo- ooa oob oof ool oom ooo oor oos or- ora orb orf orl orm oro orr ors os- osa osb osf osl osm oso osr oss ra- raa rab raf ral ram rao rar ras rba rbb rbf rbl rbm rbo rbr rbs rfa rfb rff rfl rfm rfo rfr rfs rla rlf rll rlm rlo rlr rls rma rmb rmf rml rmm rmo rmr rms roa rob rof rol rom roo ror ros rra rrb rrf rrl rrm rrr rrs rsa rsb rsf rsl rsm rso rsr rss saa sab saf sal sam sao sar sas sba sbb sbf sbl sbm sbo sbr sbs sfa sfb sff sfl sfm sfo sfr sfs sla slb slf sll slm slo slr sls sma smb smf sml smm smo smr sms soa sob sof sol som soo sor sos sr- sra srb srf srl srm sro srr srs ss- ssa ssb ssf ssl ssm sso ssr sss