a-a a-b a-i a-t aaa aab aai aao aar aas aat ab- aba abb abi abo abr abs abt ai- aia aib aii aio air ais ait aoa aob aoi aoo aor aos aot ar- ara arb ari aro arr ars art as- asa asb asi aso asr ass ast at- ata atb ati ato atr ats att baa bab bai bao bar bas bat bba bbb bbi bbo bbr bbs bbt bi- bia bib bii bio bir bis bit boa bob boi boo bor bos bot bra brb bri bro brr brs brt bsa bsb bsi bso bsr bss bst bta btb bti bto btr bts btt ia- iaa iab iai iao iar ias iat iba ibb ibi ibo ibr ibs ibt iia iib iii iio iir iis iit io- ioa iob ioi ioo ior ios iot ir- ira irb iri iro irr irs irt is- isa isb isi iso isr iss ist ita itb iti ito its itt o-i oaa oab oai oao oar oas oat ob- oba obb obi obo obr obs obt oia oib oii oio oir ois oit oo- ooa oob ooi ooo oor oos oot or- ora orb ori oro orr ors ort os- osa osb osi oso osr oss ost ot- ota otb oti oto otr ots ott ra- raa rab rai rao rar ras rat rba rbb rbi rbo rbr rbs rbt ria rib rii rio rir ris rit roa rob roi roo ror ros rot rra rrb rri rrr rrs rrt rsa rsb rsi rso rsr rss rst rta rtb rti rto rtr rts rtt saa sab sai sao sar sas sat sba sbb sbi sbo sbr sbs sbt sia sib sii sio sir sis sit soa sob soi soo sor sos sot sr- sra srb sri sro srr srs srt ss- ssa ssb ssi sso ssr sss sst sta stb sti sto str sts stt taa tab tai tao tar tas tat tba tbb tbi tbo tbr tbs tbt tia tib tii tio tir tis tit to- toa tob toi too tor tos tot tra trb tri tro trr trs trt tsa tsb tsi tso tsr tss tst tta ttb tti tto ttr tts ttt

a-ii aaaa aaab aaai aaar aaas aaba aabb aabi aabt aaib aaii aais aaoo aara aari aaro aars aart aasa aasi aass aast aata aatt abaa abab abai abar abas abat abb- abba abbb abbi abbo abbr abbs abbt abia abib abir abis abit aboa abob aboo abor abos abot abra abri abro abrs abs- absa absi abss abta abts aiai aias aiba aibo aiia aiib aiir aioi aira airi airo airs airt aisa aisb aisi aiso aisr aist aita aiti aitr aits aitt aoba aora aorb aors aort aoss arab arai arar aras arat arba arbi arbs aria arib arii ario aris arit aroa arob aroi aroo aror aros arr- arra arri arro arrr arrs arrt ars- arsa arsi arso arst arta arti arto artr arts asaa asab asai asao asar asas asat asba asbo asia asii asio asir asis asit asob asoi asor asos asot asra asro asrs assa assi asso assr asss asst asta astb asti asto astr asts at-t ataa atab atai atar atas atat atbs atia atis atit atob atoi ator atos atot atra atri atro atsb atsi atst atta atti atto attr atts ba-i baaa baar baas baat baba babb babi babo babr babs baia baib baio bair bais bait baos bar- bara barb bari baro barr bars bart basa basi baso bass bast bata bati bato bats batt bbas bbbb bbbs biao biar bias biat biba bibb bibi bibo bibs biis bio- bioi bios biot bira birb biri biro birr birs birt bis- bisa biso biss bist bita bito bits bitt boab boai boar boas boat boba bobb bobi bobo bobs boi- boii bois boit boob boor boos boot bor- bora bori boro borr bors bort bosa bosi boso boss bost bota botb boti boto bots bott brab brai brao bras brat bria brio bris brit broa brob broo bror bros brot brrr brrs brsb brsr brst bsaa bsas bsat bsos bsra bsts btaa btob btor btrt btss bttb iaaa iaai iaas iaat iaba iaia iais iara iars iart iasa iasi iaso iasr iata iati ibar ibas ibat ibia ibis ibos ibot ibra ibri ibro ibsa ibss ibtb ibts iias iiii iiio iiis iiit iioi iioo iios iira iirs iisi iisr iist iita iitr iitt ioba iobi ioii ioio ioit iooi iooo ioos iora iori iors ioso iota ioto irai irao irar iras iri- iria irio iris irob irra irri irrs irsa irta irti irts is-a isai isao isar isas isat isba isbt isia isis isit iso- isor isos isra isri issa issi isso issr isss ista isti isto istr ists itaa itai itar itas itat itbs itia itis itoi itoo itor itos itra itri itrs itsa itsi itso itta itto oais oara oars oasi oass oast oats obai obas obba obbo obia obis obit oboi obor obos obot obra obri obro obsr obss obst obts oiba oiii oios oira oirt oist oita oiti ooaa ooba oobi ooia oooo ooos oora oort oosa oosi oost ootb oots orab orai orao orar oras orat orba orbb orbi orbo orbs ori- oria orio oris orit oro- oror oros orot orra orri orro orrs orsa orsi orso orta orto orts osai osar osas osat osba osia osii osis osoi osoo osor osos osro ossa ossb ossi osso osta osti ostr osts otar otas otbs otis otit oto- otoo otor otos otra otro otrs otsa otso otta otti otto otts raab raas raat raba rabb rabi rabo rabs raia raii rair rais rait raob raos rara rarb rari raro rars rasa rasi raso rass rast rata rati rato rats ratt rbbb rbbr rbbs rbis rbss rbst riaa riab riai rias riat rib- riba ribo ribs riia riis rios riot riri rirs risa risi riso riss rist rita riti rito rits ritt roab roar roas roat rob- roba robb robi robo robs robt