a-a a-b a-i aaa aab aaf aai aam aao aar ab- aba abb abf abi abm abo abr af- afa afb aff afi afm afo afr ai- aia aib aif aii aim aio air ama amb amf ami amm amo amr aoa aob aof aoi aom aoo aor ar- ara arb arf ari arm aro arr baa bab baf bai bam bao bar bba bbb bbf bbi bbm bbo bbr bfa bfb bff bfi bfm bfo bfr bi- bia bib bif bii bim bio bir bma bmb bmf bmi bmm bmo bmr boa bob bof boi bom boo bor bra brb brf bri brm bro brr faa fab faf fai fam fao far fba fbb fbf fbi fbm fbo fbr ffa fff ffi ffm ffo ffr fia fib fif fii fim fir fma fmb fmf fmi fmm fmo fmr foa fob fof foi fom foo for fra frb frf fri frm fro frr i-f ia- iaa iab iaf iai iam iao iar iba ibb ibf ibi ibm ibo ibr ifa ifb iff ifi ifm ifo ifr iia iib iif iii iim iio iir im- ima imb imf imi imm imo io- ioa iob iof ioi iom ioo ior ir- ira irb irf iri irm iro irr m-f m-o m-r maa mab maf mai mam mao mar mba mbb mbf mbi mbm mbo mbr mfa mfb mff mfi mfm mfo mfr mi- mia mib mif mii mim mio mir mma mmb mmf mmi mmm mmo mmr moa mob mof moi mom moo mor mra mrb mrf mri mrm mro mrr o-i oaa oab oaf oai oam oao oar ob- oba obb obf obi obm obo obr of- ofa ofb off ofi ofm ofo ofr oia oib oif oii oim oio oir om- oma omb omf omi omm omo omr oo- ooa oob oof ooi oom ooo oor or- ora orb orf ori orm oro orr ra- raa rab raf rai ram rao rar rba rbb rbf rbi rbm rbo rbr rfa rfb rff rfi rfm rfo rfr ria rib rif rii rim rio rir rma rmb rmf rmi rmm rmo rmr roa rob rof roi rom roo ror rra rrb rrf rri rrm rrr

a-ii aaaa aaab aaaf aaai aaam aaar aaba aabb aabi aabm aafa aafb aaff aafi aaib aaii aama aamb aami aamo aamr aaoo aara aari aarm aaro abaa abab abaf abai abam abar abb- abba abbb abbi abbo abbr abff abia abib abim abir abma abmb aboa abob abof aboo abor abra abri abro afaa afam afao afar affa affi affo afia afib afif afir afma afoa afoo afor afr- afra afri afrm afro aiai aiba aibo aiff aiia aiib aiir aimi aimm aimo aioi aira airi airo amaa amai amam amar amb- amba ambi ambo ambr amfm amfr amia amib amif amii amir amm- amma ammi ammo amob amof amoi amoo amor amra amri amro aoba aoma aora aorb arab araf arai aram arar arba arbi arfa arfb arff aria arib arif arii arim ario arma armi armm armo aroa arob aroi arom aroo aror arr- arra arri arro arrr ba-i baaa baaf baam baar baba babb babi babm babo babr baff bafo baia baib baio bair bama bamb bamf bami bamm bar- bara barb barf bari barm baro barr bbbb biaf biao biar biba bibb bibi bibo bifa biff bifi bima bimo bio- bioi bira birb biri biro birr bmaa bmir bmmi boab boai boar boba bobb bobi bobo bofa boff boi- boii boim boma bomb bomi boob boof boom boor bor- bora borf bori borm boro borr brab braf brai bram brao brfm bria brim brio broa brob brom broo bror brrm brrr faaa faam faba fabi fabm fabo fafa faff fafi fafo faim faio fair fama fami famo fara farb farm faro farr fbar fbom ffar ffff ffii ffrr fiaa fiaf fiar fiba fifa fiff fifi fifm fifo fiii fima fimo fimr fior fira firm fmri foaf foam foar foba fofo foia foma fomo foof foom for- fora forb fori form foro forr frab fram fria frib frim frio frob from iaaa iaai iaba iabm iaff iaia iaim iama iamb iami iara ibar ibbm ibfi ibia ibim ibma ibra ibri ibro ifaa ifao ifar ifbb ifim ifma ifor ifra ifrb ifrf ifri iifa iiii iiio iioi iioo iira imaf imai imam imao imar imba imbi imfi imir imma immi immo imof imra imri imro imrr ioba iobi ioii ioio ioma iomo ioof iooi iooo iora iori iraf irai iram irao irar irbm irfm iri- iria irio irma irmo irob irra irri ma-i maaa maaf maai maam maar maba mabi mabo mafa mafb maff mafi maia maib maif maii maim maio mair mama mamf mami mamo maoi maor mar- mara marf mari marm maro marr mbam mbba mbia mbim mbio mfbm mffa mfor mfri miaa miab miaf miai miam miao mifa miff mifi miii miio mim- mima mimi mimo mio- mira miri miro mirr mmaa mmab mmai mmar mmff mmii mmmm mmor mmrf moaa moab moaf moai moam moar moba mobb mobi mobo mofa moff mofo moif moii moio moir moma momi momo mooa moob moor mora morb morf mori moro mrbb mrbm mria oafo oama oara obai obba obbo obia oboi obor obra obri obro off- offa offo offr ofor ofra oiba oiii oimb oira omai omam omao omar ombo omia omim omio omma omo- omoa omoi omoo omor omra omri omro ooaa ooba oobi ooff ooia ooma oooo oora orab orai oram orao orar orba orbb orbi orbo orff orfi ori- oria orif orio orma ormo oro- orof orom oror orra orri orro raab raaf raam raba rabb rabi rabo rafa raff rafi raia raif raii raim rair rama ramb rami ramm ramo raob raom rara rarb rarf rari raro rbaf rbbb rbbr rfam riaa riab riai riam rib- riba ribo rifa riff riia riif rima rimi rimm rimo riom riri rmaf rmif roab roaf roam roar rob- roba robb robi robo roff rofo roia roif roio roir roma romb romi romm