-al -ol a-a a-b a-t aaa aab aaf aal aam aao aat ab- aba abb abf abl abm abo abt af- afa afb aff afl afm afo aft al- ala alb alf all alm alo alt ama amb amf aml amm amo amt aoa aob aof aol aom aoo aot at- ata atb atf atl atm ato att baa bab baf bal bam bao bat bba bbb bbf bbl bbm bbo bbt bfa bfb bff bfl bfm bfo bft bla blb blf bll blm blo blt bma bmb bmf bml bmm bmo bmt boa bob bof bol bom boo bot bta btb btf btl btm bto btt faa fab faf fal fam fao fat fba fbb fbf fbl fbm fbo fbt ffa fff ffl ffm ffo fft fla flb flf fll flm flo flt fma fmb fmf fml fmm fmo fmt foa fob fof fol fom foo fot fta ftb ftf ftl ftm fto ftt la- laa lab laf lal lam lao lat lba lbb lbf lbl lbm lbo lbt lfa lfb lff lfl lfm lfo lft lla llb llf lll llm llo llt lma lmb lmf lml lmm lmo lmt loa lob lof lol lom loo lot lta ltb ltf ltl ltm lto ltt m-f m-o maa mab maf mal mam mao mat mba mbb mbf mbl mbm mbo mbt mfa mfb mff mfl mfm mfo mft mla mlb mlf mll mlm mlo mlt mma mmb mmf mml mmm mmo mmt moa mob mof mol mom moo mot mta mtb mtf mtl mtm mto mtt oaa oab oaf oal oam oao oat ob- oba obb obf obl obm obo obt of- ofa ofb off ofl ofm ofo oft ola olb olf oll olm olo olt om- oma omb omf oml omm omo omt oo- ooa oob oof ool oom ooo oot ot- ota otb otf otl otm oto ott taa tab taf tal tam tao tat tba tbb tbf tbl tbm tbo tbt tfa tfb tff tfl tfm tfo tft tla tlf tll tlm tlo tlt tma tmb tmf tml tmm tmo tmt to- toa tob tof tol tom too tot tta ttb ttf ttl ttm tto ttt