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a-fu a-ii aaaa aaab aaaf aaai aaar aaas aaba aabb aabi aafa aafb aaff aafi aaib aaii aais aara aari aars aaru aasa aasf aasi aass aasu aaus abaa abab abaf abai abar abas abau abb- abba abbb abbi abbr abbs abff abia abib abir abis abiu abra abri abrs abs- absa absf absi abss absu abua abuf abus afaa afar afbs affa affi affs afia afib afif afir afis afr- afra afri afrs afru afsa afsb afua afus aiai aias aiba aiff aifs aiia aiib aiir aira airi airs aisa aisb aisi aisr aiui arab araf arai arar aras arau arba arbi arbs arfa arfb arff arfs arfu aria arib arif arii aris arr- arra arri arrr arrs arru ars- arsa arsi arsu arua arub arui asaa asab asaf asai asar asas asau asba asbu asfa asfi asia asif asii asir asis asra asrs asru assa assi assr asss assu asub asui asur asus auaa aufi aufs auis aur- aura auri ausa ausu ba-i baaa baaf baar baas baba babb babi babr babs babu baff baia baib bair bais bar- bara barb barf bari barr bars baru basa basf basi bass basu bau- bauf baur bbas bbau bbbb bbbs bfas bffs bfsi bfsr biaf biar bias biba bibb bibi bibs bifa biff bifi biis bira birb biri birr birs biru bis- bisa biss bisu brab braf brai bras brau brfu bria bris brrr brrs brsb brsr brus bsaa bsas bsfa bsff bsfs bsra buar buba bubb bubi bubs bubu buff bufr buif buir buis buiu bur- bura burb buri burr burs buru busa busi buss busu buus faaa faas faba fabi fabs fabu fafa faff fafi fair fais fara farb farr fars faru fasa fasi fass faur fbar fbis fbrs fbus ffar ffff ffii ffrr ffsa ffss fiaa fiaf fiar fias fiba fibs fifa fiff fifi fiii fira firs fisa fisi fiss fisu fiua frab fras frau fria frib fris frsb frub fsai fsas fsfi fsia fsra fssa fssf fuar fubb fubs fubu fuff fufu fuir fur- fura furi furr furs fusa fusi fuss fusu iaaa iaai iaas iaba iaff iaia iais iara iars iaru iasa iasi iasr ibar ibas ibfi ibia ibis ibra ibri ibsa ibsf ibss ibus ifaa ifar ifas ifbb ifis ifra ifrb ifrf ifri ifsa ifsb iias iifa iiii iiis iira iirs iisi iisr iisu iraf irai irar iras irfu iri- iria iris irra irri irrs irsa irsf irus is-a isaf isai isar isas isba isfa isia isis isra isri issa issf issi issr isss issu isua isus iuiu iura iuss raab raaf raas raba rabb rabi rabs rabu rafa raff rafi raia raif raii rair rais raiu rara rarb rarf rari rars rasa rasi rass rasu raua raub rauf raus rbaf rbbb rbbr rbbs rbis rbss riaa riab riai rias riau rib- riba ribs ribu rifa riff rifs rifu riia riif riis riri rirs risa risi riss risu rius rras rrif rrrr rsaa rsaf rsai rsbi rsis rssa rsua ruas ruba rubb rubi rubs rubu rufa ruff ruif ruis rura ruri rurs ruru rusa rusi russ rusu s-ib s-ii saab saaf saar saas saba sabb sabi sabr sabs sabu safa safb saff safi safr safu saia saif sair sais sara sarf sari sarr sars saru sasa sasf sasi sass saua sauf saur saus sbaa sbai sbar sbas sbbs sbia sbsa sbsi sbus sfar sfas sfba sfia sfra sfss sfsu siaa siab siaf siai sias siau siba sibi sibs sibu sifa siff sifr sifu sira sirf siri sirr sirs siru sisa sisi siss sisu siui sius sraf sras srfi srib sris srub ssaa ssab ssas ssau ssbr ssis ssra ssri ssrs sssa sssb sssf sssi ssss suar suas sub- suba subb subi subs suf- sufa suff sufi sufr sufs sufu suir suis sur- sura surf suri surr surs suru sus- susa susi suss susu suus uafa uair uars uaru uasa uaua