a-a a-b a-i aaa aab aaf aai aao aar aas aau ab- aba abb abf abi abo abr abs abu af- afa afb aff afi afo afr afs afu ai- aia aib aif aii aio air ais aiu aoa aob aof aoi aoo aor aos aou ar- ara arb arf ari aro arr ars aru as- asa asb asf asi aso asr ass asu au- aua aub auf aui auo aur aus b-u baa bab baf bai bao bar bas bau bba bbb bbf bbi bbo bbr bbs bbu bfa bfb bff bfi bfo bfr bfs bfu bi- bia bib bif bii bio bir bis biu boa bob bof boi boo bor bos bou bra brb brf bri bro brr brs bru bsa bsb bsf bsi bso bsr bss bsu bua bub buf bui buo bur bus buu faa fab faf fai fao far fas fau fba fbb fbf fbi fbo fbr fbs fbu ffa fff ffi ffo ffr ffs ffu fia fib fif fii fir fis fiu foa fob fof foi foo for fos fou fra frb frf fri fro frr frs fru fsa fsb fsf fsi fso fsr fss fsu fua fub fuf fui fuo fur fus fuu i-f ia- iaa iab iaf iai iao iar ias iau iba ibb ibf ibi ibo ibr ibs ibu ifa ifb iff ifi ifo ifr ifs ifu iia iib iif iii iio iir iis iiu io- ioa iob iof ioi ioo ior ios iou ir- ira irb irf iri iro irr irs iru is- isa isb isf isi iso isr iss isu iu- iua iub iui iur ius o-i oaa oab oaf oai oao oar oas oau ob- oba obb obf obi obo obr obs obu of- ofa ofb off ofi ofo ofr ofs ofu oia oib oif oii oio oir ois oiu oo- ooa oob oof ooi ooo oor oos or- ora orb orf ori oro orr ors oru os- osa osb osf osi oso osr oss osu ou- oua ouf oui ouo our ous ra- raa rab raf rai rao rar ras rau rba rbb rbf rbi rbo rbr rbs rbu rfa rfb rff rfi rfo rfr rfs rfu ria rib rif rii rio rir ris roa rob rof roi roo ror ros rou rra rrb rrf rri rrr rrs rru rsa rsb rsf rsi rso rsr rss rsu rua rub ruf rui ruo rur rus ruu saa sab saf sai sao sar sas sau sba sbb sbf sbi sbo sbr sbs sbu sfa sfb sff sfi sfo sfr sfs sfu sia sib sif sii sio sir sis siu soa sob sof soi soo sor sos sou sr- sra srb srf sri sro srr srs ss- ssa ssb ssf ssi sso ssr sss ssu sua sub suf sui suo sur sus suu ua- uaa uab uaf uai uao uar uas uau uba ubb ubf ubi ubo ubr ubs ubu ufa uff ufi ufo ufr ufs ufu uia uib uif uii uio uir uis uiu uoa uob uoo uor uos ur- ura urb urf uri uro urr urs uru usa usb usf usi uso usr uss usu uua uur uus uuu

-ous a-fu a-ii aaaa aaab aaaf aaai aaar aaas aaba aabb aabi aafa aafb aaff aafi aaib aaii aais aaoo aara aari aaro aars aaru aasa aasf aasi aass aasu aaus abaa abab abaf abai abar abas abau abb- abba abbb abbi abbo abbr abbs abff abia abib abir abis abiu aboa abob abof aboo abor abos abou abra abri abro abrs abs- absa absf absi abss absu abua abuf abus afaa afao afar afbs affa affi affo affs afia afib afif afir afis afoa afoo afor afr- afra afri afro afrs afru afsa afsb afua afus aiai aias aiba aibo aiff aifs aiia aiib aiir aioi aira airi airo airs aisa aisb aisi aiso aisr aiui aoba aora aorb aors aoss aouf aous arab araf arai arar aras arau arba arbi arbs arfa arfb arff arfs arfu aria arib arif arii ario aris aroa arob aroi aroo aror aros arr- arra arri arro arrr arrs arru ars- arsa arsi arso arsu arua arub arui asaa asab asaf asai asao asar asas asau asba asbo asbu asfa asfi asia asif asii asio asir asis asob asof asoi asor asos asou asra asro asrs asru assa assi asso assr asss assu asub asui asur asus auaa aufi aufs auis aur- aura auri auro ausa ausu ba-i baaa baaf baar baas baba babb babi babo babr babs babu baff bafo baia baib baio bair bais baos bar- bara barb barf bari baro barr bars baru basa basf basi baso bass basu bau- bauf baur bbas bbau bbbb bbbs bfas bffs bfsi bfsr biaf biao biar bias biba bibb bibi bibo bibs bifa biff bifi biis bio- bioi bios biou bira birb biri biro birr birs biru bis- bisa biso biss bisu boab boai boar boas boba bobb bobi bobo bobs bobu bofa boff bofs bofu boi- boii bois boiu boob boof boor boos bor- bora borf bori boro borr bors boru bosa bosi boso boss bosu boua bouf bour bous brab braf brai brao bras brau brfu bria brio bris broa brob broo bror bros brou brrr brrs brsb brsr brus bsaa bsas bsfa bsff bsfs bsos bsra buar buba bubb bubi bubo bubs bubu buff bufo bufr buif buir buis buiu bur- bura burb buri buro burr burs buru busa busi buss busu buus faaa faas faba fabi fabo fabs fabu fafa faff fafi fafo faio fair fais fara farb faro farr fars faru fasa fasi faso fass faur fbar fbis fbrs fbus ffar ffff ffii ffrr ffsa ffss fiaa fiaf fiar fias fiba fibs fifa fiff fifi fifo fiii fior fios fira firs fisa fisi fiss fisu fiua foaf foar foba fobs fofo foia fois foof foos for- fora forb fori foro forr fors fosa fosb fosi foso foss foua four fous frab fras frau fria frib frio fris frob fros frou frsb frso frub fsai fsas fsfi fsfo