a-a a-b a-i a-t aaa aab aaf aai aao aar aat ab- aba abb abf abi abo abr abt af- afa afb aff afi afo afr aft ai- aia aib aif aii aio air ait aoa aob aof aoi aoo aor aot ar- ara arb arf ari aro arr art at- ata atb atf ati ato atr att baa bab baf bai bao bar bat bba bbb bbf bbi bbo bbr bbt bfa bfb bff bfi bfo bfr bft bi- bia bib bif bii bio bir bit boa bob bof boi boo bor bot bra brb brf bri bro brr brt bta btb btf bti bto btr btt faa fab faf fai fao far fat fba fbb fbf fbi fbo fbr fbt ffa fff ffi ffo ffr fft fia fib fif fii fir fit foa fob fof foi foo for fot fra frb frf fri fro frr frt fta ftb ftf fti fto ftr ftt i-f ia- iaa iab iaf iai iao iar iat iba ibb ibf ibi ibo ibr ibt ifa ifb iff ifi ifo ifr ift iia iib iif iii iio iir iit io- ioa iob iof ioi ioo ior iot ir- ira irb irf iri iro irr irt ita itb itf iti ito itt o-i oaa oab oaf oai oao oar oat ob- oba obb obf obi obo obr obt of- ofa ofb off ofi ofo ofr oft oia oib oif oii oio oir oit oo- ooa oob oof ooi ooo oor oot or- ora orb orf ori oro orr ort ot- ota otb otf oti oto otr ott ra- raa rab raf rai rao rar rat rba rbb rbf rbi rbo rbr rbt rfa rfb rff rfi rfo rfr rft ria rib rif rii rio rir rit roa rob rof roi roo ror rot rra rrb rrf rri rrr rrt rta rtb rtf rti rto rtr rtt taa tab taf tai tao tar tat tba tbb tbf tbi tbo tbr tbt tfa tfb tff tfi tfo tfr tft tia tib tif tii tio tir tit to- toa tob tof toi too tor tot tra trb trf tri tro trr trt tta ttb ttf tti tto ttr ttt

a-ii aaaa aaab aaaf aaai aaar aaba aabb aabi aabt aafa aafb aaff aafi aaib aaii aaoo aara aari aaro aart aata aatf aatt abaa abab abaf abai abar abat abb- abba abbb abbi abbo abbr abbt abff abia abib abir abit aboa abob abof aboo abor abot abra abri abro abta afaa afao afar afat affa affi affo afft afia afib afif afir afit afoa afoo afor afr- afra afri afro afta aiai aiba aibo aiff aiia aiib aiir aioi aira airi airo airt aita aitf aiti aitr aitt aoba aora aorb aort aotf arab araf arai arar arat arba arbi arfa arfb arff arft aria arib arif arii ario arit aroa arob aroi aroo aror arr- arra arri arro arrr arrt arta arti arto artr at-t ataa atab atai atar atat atfb atia atif atit atob atof atoi ator atot atra atri atro atta atti atto attr ba-i baaa baaf baar baat baba babb babi babo babr baff bafo baft baia baib baio bair bait bar- bara barb barf bari baro barr bart bata batf bati bato batt bbbb bfta bftt biaf biao biar biat biba bibb bibi bibo bifa biff bifi bio- bioi biot bira birb biri biro birr birt bita bito bitt boab boai boar boat boba bobb bobi bobo bofa boff boi- boii boit boob boof boor boot bor- bora borf bori boro borr bort bota botb boti boto bott brab braf brai brao brat bria brio brit broa brob broo bror brot brrr btaa btaf btob btor btrt bttb faaa faba fabi fabo fafa faff fafi fafo faio fair fait fara farb faro farr fart fata fatf fati fato fatt fbar ffar ffff ffii ffrr fftf fiaa fiaf fiar fiat fiba fifa fiff fifi fifo fift fiii fior fira fita fiti fitt foaf foar foba fobt fofo foia foof foot for- fora forb fori foro forr fort fota foti foto fott frab frat fria frib frio frit frob frot frta ftii iaaa iaai iaat iaba iaff iaia iara iart iata iati ibar ibat ibfi ibia ibot ibra ibri ibro ibtb ifaa ifao ifar ifat ifbb ifit ifor ifra ifrb ifrf ifri ifta ifto iifa iiii iiio iiit iioi iioo iira iita iitr iitt ioba iobi ioii ioio ioit ioof iooi iooo iora iori iota iotf ioto iraf irai irao irar iri- iria irio irob irra irri irta irtf irti itaa itaf itai itar itat itfa itia itif itof itoi itoo itor itra itrf itri itta ittf itto oafo oara obai obba obbo obia obit oboi obor obot obra obri obro off- offa offo offr ofit ofor ofra ofta oiba oiii oira oirt oita oiti ooaa ooba oobi ooff ooia oooo oora oort ootb orab orai orao orar orat orba orbb orbi orbo orff orfi ori- oria orif orio orit oro- orof oror orot orra orri orro orta orto otar otif otit oto- otof otoo otor otra otro otta otti otto raab raaf raat raba rabb rabi rabo rafa raff rafi raft raia raif raii rair rait raob rara rarb rarf rari raro rata ratf rati rato ratt rbaf rbbb rbbr riaa riab riai riat rib- riba ribo rifa riff rift riia riif riot riri rita riti rito ritt roab roaf roar roat rob- roba robb robi robo robt roff rofo roia roif roio roir roit roob roof rooi roor root rora rori roro rort rota roti roto rotr rott rrat rrif rrrr rtai rtbf rtfb taa- taaf taar taat taba tabb tabi tabo tafa taff tafi tafo taft taia taio tair tait taoa taor tara tarb tarf tari taro tarr tart tata tatb tati tato tatr tatt tbaf tbar tbit tbrb tbta tfot tiaa tiab tiaf tiao tiar tiba tibi tifa tiff tifo tift tiit tira tirb tiri tiro tirr tita titi tito titt toab toat toba tobi tobo tobt tofa toff tofi