a-a a-b a-i a-t aaa aab aai aao aap aar aat ab- aba abb abi abo abp abr abt ai- aia aib aii aio aip air ait aoa aob aoi aoo aop aor aot ap- apa apb api apo app apr apt ar- ara arb ari aro arp arr art at- ata atb ati ato atp atr att b-p baa bab bai bao bap bar bat bba bbb bbi bbo bbp bbr bbt bi- bia bib bii bio bip bir bit boa bob boi boo bop bor bot bpa bpb bpi bpo bpp bpr bpt bra brb bri bro brp brr brt bta btb bti bto btp btr btt ia- iaa iab iai iao iap iar iat iba ibb ibi ibo ibp ibr ibt iia iib iii iio iip iir iit io- ioa iob ioi ioo iop ior iot ipa ipb ipi ipo ipp ipr ipt ir- ira irb iri iro irp irr irt ita itb iti ito itp itt o-i oaa oab oai oao oap oar oat ob- oba obb obi obo obp obr obt oia oib oii oio oip oir oit oo- ooa oob ooi ooo oop oor oot op- opa opb opi opo opp opr opt or- ora orb ori oro orp orr ort ot- ota otb oti oto otp otr ott p-p paa pab pai pao pap par pat pba pbb pbi pbo pbp pbr pbt pia pib pii pio pip pir pit poa pob poi poo pop por pot ppa ppb ppi ppo ppp ppr ppt pra prb pri pro prp prr prt pt- pta ptb pti pto ptp ptr ptt ra- raa rab rai rao rap rar rat rba rbb rbi rbo rbp rbr rbt ria rib rii rio rip rir rit roa rob roi roo rop ror rot rpa rpb rpi rpo rpp rpr rpt rra rrb rri rrp rrr rrt rta rtb rti rto rtp rtr rtt taa tab tai tao tap tar tat tba tbb tbi tbo tbp tbr tbt tia tib tii tio tip tir tit to- toa tob toi too top tor tot tpa tpb tpi tpo tpp tpr tpt tra trb tri tro trp trr trt tta ttb tti tto ttp ttr ttt

a-ii aaaa aaab aaai aaap aaar aaba aabb aabi aabp aabt aaib aaii aaoo aapa aapi aapo aapt aara aari aaro aarp aart aata aatt abaa abab abai abap abar abat abb- abba abbb abbi abbo abbr abbt abia abib abir abit aboa abob aboo abor abot abpa abpi abpp abpr abra abri abro abta aiai aiba aibo aiia aiib aiir aioi aipa aipi aira airi airo airp airt aita aiti aitr aitt aoba aopo aora aorb aort apai apao apap apar apat apba apbr api- apia apio apip apit apo- apoo apop apor apot appa appr appt apra apri apro aprt apta apti aptt arab arai arap arar arat arba arbi aria arib arii ario arip arit aroa arob aroi aroo aror arpa arpi arr- arra arri arro arrr arrt arta arti arto artr at-t ataa atab atai atap atar atat atia atip atit atob atoi atop ator atot atpr atra atri atro atrp atta atti atto attp attr ba-i baaa baar baat baba babb babi babo babr baia baib baio bair bait bapa bapi bapp bapt bar- bara barb bari baro barr bart bata bati bato batt bbbb bbpr biao biap biar biat biba bibb bibi bibo bio- bioi biot bipa bipp bira birb biri biro birr birt bita bito bitt boab boai boar boat boba bobb bobi bobo boi- boii boit boob boop boor boot bopa bopp bor- bora bori boro borr bort bota botb boti boto bott bpai bpot bpti brab brai brao brat bria brio brit broa brob broo bror brot brrr btaa btbp btob btor btrt bttb iaaa iaai iaap iaat iaba iaia iapa iapp iapt iara iart iata iati ibar ibat ibia ibot ibra ibri ibro ibtb iiii iiio iiit iioi iioo iiop iipa iira iita iitr iitt ioba iobi ioii ioio ioit iooi iooo iora iori iota ioto ipat ipba ipop ippa ippo ippr ipri ipta ipto irai irao irap irar irbp iri- iria irio irip irob irop irpa irra irri irta irti irtp itaa itai itap itar itat itia itoi itoo itor itpa itra itri itta itto oapi oara obai obba obbo obia obit oboi obor obot obra obri obro oiba oiii oira oirt oita oiti ooaa ooba oobi ooia oooo oora oort ootb ootp opap opar opia opii opio opit opo- opor oppa oppi oppo opra opti opto orab orai orao orar orat orba orbb orbi orbo ori- oria orio orit oro- oror orot orpi orra orri orro orta orto otap otar otit oto- otoo otor otpp otra otro otta otti otto paap paar paat paba pabt paia paib paio paip pair pait papa papb papi papp papr par- para pari paro parp parr part pata pati pato patr patt pbar pbpa piai piao piat pibb pibi piia piip piob piot pipa pipi pipo pipp pira piri piro pirr pita piti pito pitr pitt poar poat poba pobo poia poio poop poor poot pop- popa popi popo popp popt pora porb pori poro porr port pota poti poto pott ppap ppar ppib ppoa pppa pppo pppp ppta pptt prai prao prar prat pri- pria prii pro- proa prob proo prop prot prri prti prtp prtr ptab ptop raab raat raba rabb rabi rabo raia raii raip rair rait raob raop rapa rapi rapp rapt rara rarb rari raro rata rati rato ratp ratt rbbb rbbr riaa riab riai riat rib- riba ribo riia riot ripa ripi ripp ripr ript riri rita riti rito ritt roab roap roar roat rob- roba robb robi robo robt roia roio roir roit roob rooi roop roor root ropa ropo rora rori roro rort rota roti roto rotr rott rpii rpob rpta rrat rrrr rtai rtpa rttp taa- taar taat taba tabb tabi tabo taia taio taip tair tait taoa taor tapa tapi tapo tapp tapr tapt tara tarb tari