a-a a-b a-c aaa aab aac aaf aam aao aar aas aau ab- aba abb abc abf abm abo abr abs abu ac- aca acb acc acf acm aco acr acs acu af- afa afb afc aff afm afo afr afs afu ama amb amc amf amm amo amr ams amu aoa aob aoc aof aom aoo aor aos aou ar- ara arb arc arf arm aro arr ars aru as- asa asb asc asf asm aso asr ass asu au- aua aub auc auf aum auo aur aus b-u baa bab bac baf bam bao bar bas bau bba bbb bbc bbf bbm bbo bbr bbs bbu bca bcb bcc bcf bcm bco bcr bcs bcu bfa bfb bfc bff bfm bfo bfr bfs bfu bma bmb bmc bmf bmm bmo bmr bms bmu boa bob boc bof bom boo bor bos bou bra brb brf brm bro brr brs bru bsa bsb bsc bsf bsm bso bsr bss bsu bua bub buc buf bum buo bur bus buu c-- caa cab cac caf cam cao car cas cau cba cbb cbc cbf cbm cbo cbr cbs cbu cca ccb ccc ccf ccm cco ccr ccs ccu cfa cfb cfc cff cfm cfo cfr cfs cfu cma cmb cmc cmf cmm cmo cmr cms cmu co- coa cob coc cof com coo cor cos cou cra crb crc crf crm cro crr crs cru csa csb csc csf csm cso csr css csu cua cub cuc cuf cum cuo cur cus cuu faa fab fac faf fam fao far fas fau fba fbb fbc fbf fbm fbo fbr fbs fbu fca fcb fcc fcf fcm fco fcr fcs fcu ffa ffc fff ffm ffo ffr ffs ffu fma fmb fmc fmf fmm fmo fmr fms fmu foa fob foc fof fom foo for fos fou fra frb frc frf frm fro frr frs fru fsa fsb fsc fsf fsm fso fsr fss fsu fua fub fuf fum fuo fur fus fuu m-f m-o m-r maa mab mac maf mam mao mar mas mau mba mbb mbc mbf mbm mbo mbr mbs mbu mc- mca mcb mcc mcf mcm mco mcr mcs mcu mfa mfb mfc mff mfm mfo mfr mfs mfu mma mmb mmc mmf mmm mmo mmr mms mmu moa mob moc mof mom moo mor mos mou mra mrb mrc mrf mrm mro mrr mrs mru msa msb msc msf msm mso msr mss msu mua mub muc muf mum mur mus muu oaa oab oac oaf oam oao oar oas oau ob- oba obb obc obf obm obo obr obs obu oc- oca ocb occ ocf ocm oco ocr ocs ocu of- ofa ofb ofc off ofm ofo ofr ofs ofu om- oma omb omc omf omm omo omr oms omu oo- ooa oob ooc oof oom ooo oor oos or- ora orb orc orf orm oro orr ors oru os- osa osb osc osf osm oso osr oss osu ou- oua ouc ouf oum ouo our ous ra- raa rab rac raf ram rao rar ras rau rba rbb rbc rbf rbm rbo rbr rbs rbu rca rcb rcc rcf rcm rco rcr rcs rcu rfa rfb rfc rff rfm rfo rfr rfs rfu rma rmb rmc rmf rmm rmo rmr rms roa rob roc rof rom roo ror ros rou rra rrb rrc rrf rrm rrr rrs rru rsa rsb rsc rsf rsm rso rsr rss rsu rua rub ruc ruf rum ruo rur rus ruu saa sab sac saf sam sao sar sas sau sba sbb sbc sbf sbm sbo sbr sbs sbu sca scb scc scf scm sco scr scs scu sfa sfb sfc sff sfm sfo sfr sfs sfu sma smb smc smf smm smo smr sms smu soa sob soc sof som soo sor sos sou sr- sra srb src srf srm sro srr srs ss- ssa ssb ssc ssf ssm sso ssr sss ssu sua sub suc suf sum suo sur sus suu ua- uaa uab uac uaf uam uao uar uas uau uba ubb ubc ubf ubo ubr ubs ubu uca ucb ucc ucf ucm uco ucr ucs ucu ufa ufc uff ufm ufo ufr ufs ufu um- uma umb umc umf umm umo umr ums umu uoa uob uoc uom uoo uor uos ur- ura urb urc urf urm uro urr urs uru usa usb usc usf usm uso usr uss usu uua uuc uum uur uus uuu

-ous a-fu aaaa aaab aaac aaaf aaam aaar aaas aaba aabb aabc aabm aaca aacb aacc aacf aacm aaco aacr aacs aacu aafa aafb aafc aaff aama aamb aamc aamo aamr aams aaoo aara aarc aarm aaro aars aaru aasa aasc aasf aasm aass aasu aaus abaa abab abac abaf abam abar abas abau abb- abba abbb abbo abbr abbs abca abcb abcc abcf abcr abcs abff abma abmb abmc abms aboa abob abof aboo abor abos abou abra abrc abro abrs abs- absa absf abss absu abua abuf abum abus acaa acab acac acar acas acba acca accc accf accm acco accs accu acfc acfm acfs acma acmc acmf acms acmu acoa acom acor acos acou acr- acra acrc acrm acro acrr acrs acsa acsc acsm acss acu- acuf acum acuo acur acus afaa afam afao afar afbs afca afcb afcc afcs afcu affa affc affo affs afma afmc afoa afoo afor afr- afra afrc afrm afro afrs afru afsa afsb afsc afsm afua afus amaa amac amam amar amas amb- amba ambo ambr ambs ambu amca amcc amco amcs amfm amfr amm- amma ammo ammu amob amoc amof amoo amor amos amou amra amrc amro amsa amsc amso amss amua amum amur aoba aoca aocs aoma aora aorb aors aoss aouf aous arab arac araf aram arar aras arau arba arbs arc- arca arcm arco arcs arfa arfb arfc arff arfs arfu arma armc armm armo arms armu aroa arob arom aroo aror aros arr- arra arrc arro arrr arrs arru ars- arsa arsc arso arsu arua