a-a a-b aaa aab aaf aar aas aau ab- aba abb abf abr abs abu af- afa afb aff afr afs afu ar- ara arb arf arr ars aru as- asa asb asf asr ass asu au- aua aub auf aur aus b-u baa bab baf bar bas bau bba bbb bbf bbr bbs bbu bfa bfb bff bfr bfs bfu bra brb brf brr brs bru bsa bsb bsf bsr bss bsu bua bub buf bur bus buu faa fab faf far fas fau fba fbb fbf fbr fbs fbu ffa fff ffr ffs ffu fra frb frf frr frs fru fsa fsb fsf fsr fss fsu fua fub fuf fur fus fuu ra- raa rab raf rar ras rau rba rbb rbf rbr rbs rbu rfa rfb rff rfr rfs rfu rra rrb rrf rrr rrs rru rsa rsb rsf rsr rss rsu rua rub ruf rur rus ruu saa sab saf sar sas sau sba sbb sbf sbr sbs sbu sfa sfb sff sfr sfs sfu sr- sra srb srf srr srs ss- ssa ssb ssf ssr sss ssu sua sub suf sur sus suu ua- uaa uab uaf uar uas uau uba ubb ubf ubr ubs ubu ufa uff ufr ufs ufu ur- ura urb urf urr urs uru usa usb usf usr uss usu uua uur uus uuu

a-fu aaaa aaab aaaf aaar aaas aaba aabb aafa aafb aaff aara aars aaru aasa aasf aass aasu aaus abaa abab abaf abar abas abau abb- abba abbb abbr abbs abff abra abrs abs- absa absf abss absu abua abuf abus afaa afar afbs affa affs afr- afra afrs afru afsa afsb afua afus arab araf arar aras arau arba arbs arfa arfb arff arfs arfu arr- arra arrr arrs arru ars- arsa arsu arua arub asaa asab asaf asar asas asau asba asbu asfa asra asrs asru assa assr asss assu asub asur asus auaa aufs aur- aura ausa ausu baaa baaf baar baas baba babb babr babs babu baff bar- bara barb barf barr bars baru basa basf bass basu bau- bauf baur bbas bbau bbbb bbbs bfas bffs bfsr brab braf bras brau brfu brrr brrs brsb brsr brus bsaa bsas bsfa bsff bsfs bsra buar buba bubb bubs bubu buff bufr bur- bura burb burr burs buru busa buss busu buus faaa faas faba fabs fabu fafa faff fara farb farr fars faru fasa fass faur fbar fbrs fbus ffar ffff ffrr ffsa ffss frab fras frau frsb frub fsas fsra fssa fssf fuar fubb fubs fubu fuff fufu fur- fura furr furs fusa fuss fusu raab raaf raas raba rabb rabs rabu rafa raff rara rarb rarf rars rasa rass rasu raua raub rauf raus rbaf rbbb rbbr rbbs rbss rras rrrr rsaa rsaf rssa rsua ruas ruba rubb rubs rubu rufa ruff rura rurs ruru rusa russ rusu saab saaf saar saas saba sabb sabr sabs sabu safa safb saff safr safu sara sarf sarr sars saru sasa sasf sass saua sauf saur saus sbaa sbar sbas sbbs sbsa sbus sfar sfas sfba sfra sfss sfsu sraf sras srub ssaa ssab ssas ssau ssbr ssra ssrs sssa sssb sssf ssss suar suas sub- suba subb subs suf- sufa suff sufr sufs sufu sur- sura surf surr surs suru sus- susa suss susu suus uafa uars uaru uasa uaua ubar ubba ubra uffa ufra uras urau urba urbs urfa urff urra ursa urss ursu urur urus us-a usaa usaf usar usas usba usbr usbs usfa usfs usra ussa ussb ussf ussr usss ussu usua usus uuuu

-aaa- aaaas aaasa aaass aabaa aabba aabfs aabra aarau aasra abaab ababa ababs ababu abara abaru abasa abass abbar abbas abbrs abbur abfab abffs abrar abras abrus absar abura aburr afara afars afsar afuss ar-ab arab- araba arabs arara arars araru arass arasu arbab arbar arbas arbus arras arrau arrua aruaa aruba arura aruru arus- arusa asaba asafa asara asasa asbru asfar asfur asrar assab assaf assas assur asubs asura auass aubas aurar auras aurra ausar ausra aussa baars babar babas babau babbs babra babur babus baffa baffs bafra baraa barab barar baras barba barbs barbu barff barfs barra barrs barru barsa barss barua barus basab basar basra bassa bassu baura bauru bbuss braas braff brasa brass brrar brrrr bruff brusa bruss bsaba bubas bubba buffa buffs buraa buras burbs burra burrs burru bursa burus busaa busra bussa bussu busua busur busuu faafu fabas fabra faffs fafsa farab faras farau farbs farfa farrs farsa farsb farus faura fauss fraba frabs frass fraus fu-fu fuars fubar fubbs fubus fuffs furrs furus fusus ra-ra raaba raaff raasa rabab rabas rabba rafar raffa raffs raraf rarfs rarus rasar rasas rasau rasfa rasra rassa rausu rffsa rsssf rubab rubba rubra rubus ruffs rufus rusar rusas russa ruusa s-bus sa-ra saaba saabs saaff saara saarf saasa saasu sabar sabas sabau sabra sabsa sabur sabus safar saffa safra safur saraa sarab saraf saras sarau sarbu sarra sarsa sarsu saru- sarur sarus sassa sauba sauff saur- saura sfaar srb-a ssafa sssrb sssss suara suars suasa subar subba subbu subra subss suffa suffr suffs sufra surab suras surau surba surfs surra surur surus susus uraba urasa urbar urras ursas ursua ursus urubu usaas usafa usafb usara usars usasf usfaa usuba usura uuuuu

aaaaba aaraas ababsa abasar abassa abbasa abbass abburu abubus aburas abusua afassa afu-ra araafa arabas araras araua araura arbra arfara arfarf arraba arsura aruaru as-sur assara assura asuras aufbau aufruf ausbbs baabaa baabar baarbu babars babbar babrru babura barara barbar barbas barbra barbus barras barsar barsau baruar basara basfar basrur bassar bassra bassus baufra baurua bbbbbb brabus brasar braura brubru bubbas bububu buffas buraas burasa burbur burras bursar bursas busbar fabara fabras faraar farara farbus farfar farrar frafra furfur furrfu raabau rababa rababs rabasa rassau rasura rubarb rubbra ruffus russas russus sabara sabbas sabras saburu safsaf safsar saraba sarara sararu sarasa sarasb sarbas sarfus sarras sarrus sarsar sarsas sauaru saurus sausar sfafaa ssabsa ssbars sssfrs subara subaru suburb surasa surasu suraua susurr