a-a a-b a-t aaa aab aaf aam aao aat aau ab- aba abb abf abm abo abt abu af- afa afb aff afm afo aft afu ama amb amf amm amo amt amu aoa aob aof aom aoo aot aou at- ata atb atf atm ato att atu au- aua aub auf aum auo aut b-u baa bab baf bam bao bat bau bba bbb bbf bbm bbo bbt bbu bfa bfb bff bfm bfo bft bfu bma bmb bmf bmm bmo bmt bmu boa bob bof bom boo bot bou bta btb btf btm bto btt btu bua bub buf bum buo but buu faa fab faf fam fao fat fau fba fbb fbf fbm fbo fbt fbu ffa fff ffm ffo fft ffu fma fmb fmf fmm fmo fmt fmu foa fob fof fom foo fot fou fta ftb ftf ftm fto ftt ftu fua fub fuf fum fuo fut fuu m-f m-o maa mab maf mam mao mat mau mba mbb mbf mbm mbo mbt mbu mfa mfb mff mfm mfo mft mfu mma mmb mmf mmm mmo mmt mmu moa mob mof mom moo mot mou mta mtb mtf mtm mto mtt mtu mua mub muf mum mut muu oaa oab oaf oam oao oat oau ob- oba obb obf obm obo obt obu of- ofa ofb off ofm ofo oft ofu om- oma omb omf omm omo omt omu oo- ooa oob oof oom ooo oot ot- ota otb otf otm oto ott otu ou- oua ouf oum ouo out taa tab taf tam tao tat tau tba tbb tbf tbm tbo tbt tbu tfa tfb tff tfm tfo tft tfu tma tmb tmf tmm tmo tmt tmu to- toa tob tof tom too tot tou tta ttb ttf ttm tto ttt ttu tua tub tuf tum tuo tut tuu ua- uaa uab uaf uam uao uat uau uba ubb ubf ubo ubt ubu ufa uff ufm ufo uft ufu um- uma umb umf umm umo umt umu uoa uob uom uoo uot uta utb utf utm uto utt utu uua uum uut uuu