a-a a-b a-t aaa aab aad aaf aam aas aat aau ab- aba abb abd abf abm abs abt abu ad- ada adb add adf adm ads adt adu af- afa afb afd aff afm afs aft afu ama amb amd amf amm ams amt amu as- asa asb asd asf asm ass ast asu at- ata atb atd atf atm ats att atu au- aua aub aud auf aum aus aut b-u baa bab bad baf bam bas bat bau bba bbb bbd bbf bbm bbs bbt bbu bda bdb bdd bdf bdm bds bdt bdu bfa bfb bfd bff bfm bfs bft bfu bma bmb bmd bmf bmm bms bmt bmu bsa bsb bsd bsf bsm bss bst bsu bta btb btd btf btm bts btt btu bua bub bud buf bum bus but buu daa dab dad daf dam das dat dau dba dbb dbd dbf dbm dbs dbt dbu dda ddb ddd ddf ddm dds ddt ddu dfa dfb dfd dff dfm dfs dft dfu dma dmb dmd dmf dmm dms dmt dmu dsa dsb dsd dsf dsm dss dst dsu dta dtb dtd dtf dtm dts dtt dtu dua dub dud duf dum dus dut faa fab fad faf fam fas fat fau fba fbb fbd fbf fbm fbs fbt fbu fda fdb fdd fdf fdm fds fdt fdu ffa ffd fff ffm ffs fft ffu fma fmb fmd fmf fmm fms fmt fmu fsa fsb fsd fsf fsm fss fst fsu fta ftb ftd ftf ftm fts ftt ftu fua fub fud fuf fum fus fut fuu m-f maa mab mad maf mam mas mat mau mba mbb mbd mbf mbm mbs mbt mbu mda mdb mdd mdf mdm mds mdt mdu mfa mfb mfd mff mfm mfs mft mfu mma mmb mmd mmf mmm mms mmt mmu msa msb msd msf msm mss mst msu mta mtb mtd mtf mtm mts mtt mtu mua mub mud muf mum mus mut muu saa sab sad saf sam sas sat sau sba sbb sbd sbf sbm sbs sbt sbu sda sdb sdd sdf sdm sds sdt sdu sfa sfb sfd sff sfm sfs sft sfu sma smb smd smf smm sms smt smu ss- ssa ssb ssd ssf ssm sss sst ssu sta stb std stf stm sts stt stu sua sub sud suf sum sus sut suu taa tab tad taf tam tas tat tau tba tbb tbd tbf tbm tbs tbt tbu tda tdb tdd tdf tdm tds tdt tdu tfa tfb tfd tff tfm tfs tft tfu tma tmb tmd tmf tmm tms tmt tmu tsa tsb tsd tsf tsm tss tst tsu tta ttb ttd ttf ttm tts ttt ttu tua tub tud tuf tum tus tut tuu ua- uaa uab uad uaf uam uas uat uau uba ubb ubf ubs ubt ubu uda udb udd udf udm uds udt udu ufa ufd uff ufm ufs uft ufu um- uma umb umd umf umm ums umt umu usa usb usd usf usm uss ust usu uta utb utd utf utm uts utt utu uua uum uus uut uuu