a-a a-b a-i aaa aab aai aao aap aar aas ab- aba abb abi abo abp abr abs ai- aia aib aii aio aip air ais aoa aob aoi aoo aop aor aos ap- apa apb api apo app apr aps ar- ara arb ari aro arp arr ars as- asa asb asi aso asp asr ass b-p baa bab bai bao bap bar bas bba bbb bbi bbo bbp bbr bbs bi- bia bib bii bio bip bir bis boa bob boi boo bop bor bos bpa bpb bpi bpo bpp bpr bps bra brb bri bro brp brr brs bsa bsb bsi bso bsp bsr bss ia- iaa iab iai iao iap iar ias iba ibb ibi ibo ibp ibr ibs iia iib iii iio iip iir iis io- ioa iob ioi ioo iop ior ios ipa ipb ipi ipo ipp ipr ips ir- ira irb iri iro irp irr irs is- isa isb isi iso isp isr iss o-i oaa oab oai oao oap oar oas ob- oba obb obi obo obp obr obs oia oib oii oio oip oir ois oo- ooa oob ooi ooo oop oor oos op- opa opb opi opo opp opr ops or- ora orb ori oro orp orr ors os- osa osb osi oso osp osr oss p-p paa pab pai pao pap par pas pba pbb pbi pbo pbp pbr pbs pia pib pii pio pip pir pis poa pob poi poo pop por pos ppa ppb ppi ppo ppp ppr pps pra prb pri pro prp prr prs ps- psa psb psi pso psp psr pss ra- raa rab rai rao rap rar ras rba rbb rbi rbo rbp rbr rbs ria rib rii rio rip rir ris roa rob roi roo rop ror ros rpa rpb rpi rpo rpp rpr rps rra rrb rri rrp rrr rrs rsa rsb rsi rso rsp rsr rss saa sab sai sao sap sar sas sba sbb sbi sbo sbp sbr sbs sia sib sii sio sip sir sis soa sob soi soo sop sor sos spa spb spi spo spp spr sps sr- sra srb sri sro srp srr srs ss- ssa ssb ssi sso ssp ssr sss

a-ii aaaa aaab aaai aaap aaar aaas aaba aabb aabi aabp aaib aaii aais aaoo aapa aapi aapo aaps aara aari aaro aarp aars aasa aasi aass abaa abab abai abap abar abas abb- abba abbb abbi abbo abbr abbs abia abib abir abis aboa abob aboo abor abos abpa abpi abpp abpr abps abra abri abro abrs abs- absa absi absp abss aiai aias aiba aibo aiia aiib aiir aioi aipa aipi aips aira airi airo airp airs aisa aisb aisi aiso aisr aoba aopo aora aorb aors aosp aoss apai apao apap apar apas apba apbr apbs api- apia apio apip apis apo- apoo apop apor apos appa appr apps apra apri apro aprs apsa apsi apso apss arab arai arap arar aras arba arbi arbs aria arib arii ario arip aris aroa arob aroi aroo aror aros arpa arpi arps arr- arra arri arro arrr arrs ars- arsa arsi arso asaa asab asai asao asap asar asas asba asbo asia asii asio asip asir asis asob asoi asop asor asos aspa aspi aspo aspr asps asra asro asrs assa assi asso assp assr asss ba-i baaa baar baas baba babb babi babo babr babs baia baib baio bair bais baos bapa bapi bapp baps bar- bara barb bari baro barr bars basa basi baso bass bbas bbbb bbbs bbpr biao biap biar bias biba bibb bibi bibo bibs biis bio- bioi bios bipa bipp bips bira birb biri biro birr birs bis- bisa biso bisp biss boab boai boar boas boba bobb bobi bobo bobs boi- boii bois boob boop boor boos bopa bopp bops bor- bora bori boro borr bors bosa bosi boso boss bpai bpsa brab brai brao bras bria brio bris broa brob broo bror bros brrr brrs brsb brsr bsaa bsap bsas bsos bspp bspr bsra iaaa iaai iaap iaas iaba iaia iais iapa iapp iaps iara iars iasa iasi iaso iasp iasr ibar ibas ibia ibis ibos ibra ibri ibro ibsa ibss iias iiii iiio iiis iioi iioo iiop iios iipa iira iirs iisi iisp iisr ioba iobi ioii ioio iooi iooo ioos iops iora iori iors ioso ipas ipba ipop ipos ippa ippo ippr ipri ipsa ipsi ipso ipsp ipss irai irao irap irar iras irbp iri- iria irio irip iris irob irop irpa irps irra irri irrs irsa irsp is-a isai isao isar isas isba isia isis iso- isop isor isos ispa ispr isps isra isri isrp issa issi isso issp issr isss oais oapi oaps oara oars oasi oass obai obas obba obbo obia obis oboi obor obos obra obri obro obsr obss oiba oiii oios oira ooaa ooba oobi ooia oooo ooos oops oora oosa oosi opap opar opia opii opio opis opo- opor opos oppa oppi oppo opps opra opsa opsi orab orai orao orar oras orba orbb orbi orbo orbs ori- oria orio oris oro- oror oros orpi orps orra orri orro orrs orsa orsi orso osai osap osar osas osba osbp osia osii osip osis osoi osoo osor osos osro ossa ossb ossi osso paap paar paas paba paia paib paio paip pair pais paos papa papb papi papp papr paps par- para pari paro parp parr pars pasa pasi paso pasp pass pbar pbpa pbrs pbsa pbsp piai piao pias pibb pibi piia piip piob pipa pipi pipo pipp pips pira piri piro pirr pirs pisa pisi piso piss poar poas poba pobo pobs poia poio pois poop poor poos pop- popa popi popo popp pops pora porb pori poro porr pors posa posb posi poso poss ppap ppar ppib ppoa ppos pppa pppo pppp ppps ppss prai prao prar pras prbs pri- pria prii pris pro- proa prob proo prop pros prps prri prrs prsa prsi prso prss psap psas psbr psia psip psis psoa psoi