a-a a-b a-t aaa aab aaf aam aao aar aas aat aau ab- aba abb abf abm abo abr abs abt abu af- afa afb aff afm afo afr afs aft afu ama amb amf amm amo amr ams amt amu aoa aob aof aom aoo aor aos aot aou ar- ara arb arf arm aro arr ars art aru as- asa asb asf asm aso asr ass ast asu at- ata atb atf atm ato atr ats att atu au- aua aub auf aum auo aur aus aut b-u baa bab baf bam bao bar bas bat bau bba bbb bbf bbm bbo bbr bbs bbt bbu bfa bfb bff bfm bfo bfr bfs bft bfu bma bmb bmf bmm bmo bmr bms bmt bmu boa bob bof bom boo bor bos bot bou bra brb brf brm bro brr brs brt bru bsa bsb bsf bsm bso bsr bss bst bsu bta btb btf btm bto btr bts btt btu bua bub buf bum buo bur bus but buu faa fab faf fam fao far fas fat fau fba fbb fbf fbm fbo fbr fbs fbt fbu ffa fff ffm ffo ffr ffs fft ffu fma fmb fmf fmm fmo fmr fms fmt fmu foa fob fof fom foo for fos fot fou fra frb frf frm fro frr frs frt fru fsa fsb fsf fsm fso fsr fss fst fsu fta ftb ftf ftm fto ftr fts ftt ftu fua fub fuf fum fuo fur fus fut fuu m-f m-o m-r maa mab maf mam mao mar mas mat mau mba mbb mbf mbm mbo mbr mbs mbt mbu mfa mfb mff mfm mfo mfr mfs mft mfu mma mmb mmf mmm mmo mmr mms mmt mmu moa mob mof mom moo mor mos mot mou mra mrb mrf mrm mro mrr mrs mrt mru msa msb msf msm mso msr mss mst msu mta mtb mtf mtm mto mtr mts mtt mtu mua mub muf mum mur mus mut muu oaa oab oaf oam oao oar oas oat oau ob- oba obb obf obm obo obr obs obt obu of- ofa ofb off ofm ofo ofr ofs oft ofu om- oma omb omf omm omo omr oms omt omu oo- ooa oob oof oom ooo oor oos oot or- ora orb orf orm oro orr ors ort oru os- osa osb osf osm oso osr oss ost osu ot- ota otb otf otm oto otr ots ott otu ou- oua ouf oum ouo our ous out ra- raa rab raf ram rao rar ras rat rau rba rbb rbf rbm rbo rbr rbs rbt rbu rfa rfb rff rfm rfo rfr rfs rft rfu rma rmb rmf rmm rmo rmr rms rmt roa rob rof rom roo ror ros rot rou rra rrb rrf rrm rrr rrs rrt rru rsa rsb rsf rsm rso rsr rss rst rsu rta rtb rtf rtm rto rtr rts rtt rtu rua rub ruf rum ruo rur rus rut ruu saa sab saf sam sao sar sas sat sau sba sbb sbf sbm sbo sbr sbs sbt sbu sfa sfb sff sfm sfo sfr sfs sft sfu sma smb smf smm smo smr sms smt smu soa sob sof som soo sor sos sot sou sr- sra srb srf srm sro srr srs srt ss- ssa ssb ssf ssm sso ssr sss sst ssu sta stb stf stm sto str sts stt stu sua sub suf sum suo sur sus sut suu taa tab taf tam tao tar tas tat tau tba tbb tbf tbm tbo tbr tbs tbt tbu tfa tfb tff tfm tfo tfr tfs tft tfu tma tmb tmf tmm tmo tmr tms tmt tmu to- toa tob tof tom too tor tos tot tou tra trb trf trm tro trr trs trt tru tsa tsb tsf tsm tso tsr tss tst tsu tta ttb ttf ttm tto ttr tts ttt ttu tua tub tuf tum tuo tur tus tut tuu ua- uaa uab uaf uam uao uar uas uat uau uba ubb ubf ubo ubr ubs ubt ubu ufa uff ufm ufo ufr ufs uft ufu um- uma umb umf umm umo umr ums umt umu uoa uob uom uoo uor uos uot ur- ura urb urf urm uro urr urs urt uru usa usb usf usm uso usr uss ust usu uta utb utf utm uto utr uts utt utu uua uum uur uus uut uuu

-ous a-fu aaaa aaab aaaf aaam aaar aaas aaba aabb aabm aabt aafa aafb aaff aama aamb aamo aamr aams aaoo aara aarm aaro aars aart aaru aasa aasf aasm aass aast aasu aata aatf aatt aaus abaa abab abaf abam abar abas abat abau abb- abba abbb abbo abbr abbs abbt abff abma abmb abms abmt aboa abob abof aboo abor abos abot abou abra abro abrs abs- absa absf abss absu abta abts abtu abua abuf abum abus abut afaa afam afao afar afat afbs affa affo affs afft afma afoa afoo afor afr- afra afrm afro afrs afru afsa afsb afsm afst afta afts afua afus amaa amam amar amas amat amb- amba ambo ambr ambs ambu amfm amfr amm- amma ammo ammu amob amof amoo amor amos amot amou amra amro amsa amso amss amst amta amto amts amua amum amur aoba aoma aora aorb aors aort aoss aotf aouf aous aout arab araf aram arar aras arat arau arba arbs arfa arfb arff arfs arft arfu arma armm armo arms armt armu aroa arob arom aroo aror aros arr- arra arro arrr arrs arrt arru ars- arsa arso arst arsu arta arto artr arts arua arub arum arut asaa asab asaf asam asao asar asas asat asau asba asbm asbo asbu asfa asma asmf asmm asmr asms asmt asob asof asom asor asos asot asou asra asrm asro asrs asru assa asso assr asss asst assu asta astb astm asto astr asts asub asum asur asus at-t ataa atab atar atas atat atbs atfb