burins ubrins bruins rbuins urbins rubins buirns ubirns biurns iburns uibrns iubrns briuns rbiuns biruns ibruns ribuns irbuns uribns ruibns uirbns iurbns riubns irubns burnis ubrnis brunis rbunis urbnis rubnis bunris ubnris bnuris nburis unbris nubris brnuis rbnuis bnruis nbruis rnbuis nrbuis urnbis runbis unrbis nurbis rnubis nrubis buinrs ubinrs biunrs ibunrs uibnrs iubnrs bunirs ubnirs bnuirs nbuirs unbirs nubirs binurs ibnurs bniurs nbiurs inburs niburs uinbrs iunbrs unibrs nuibrs inubrs niubrs brinus rbinus birnus ibrnus ribnus irbnus brnius rbnius bnrius nbrius rnbius nrbius binrus ibnrus bnirus nbirus inbrus nibrus rinbus irnbus rnibus nribus inrbus nirbus urinbs ruinbs uirnbs iurnbs riunbs irunbs urnibs runibs unribs nuribs rnuibs nruibs uinrbs iunrbs unirbs nuirbs inurbs niurbs rinubs irnubs rniubs nriubs inrubs nirubs burisn ubrisn bruisn rbuisn urbisn rubisn buirsn ubirsn biursn ibursn uibrsn iubrsn briusn rbiusn birusn ibrusn ribusn irbusn uribsn ruibsn uirbsn iurbsn riubsn irubsn bursin ubrsin brusin rbusin urbsin rubsin busrin ubsrin bsurin sburin usbrin subrin brsuin rbsuin bsruin sbruin rsbuin srbuin ursbin rusbin usrbin surbin rsubin srubin buisrn ubisrn biusrn ibusrn uibsrn iubsrn busirn ubsirn bsuirn sbuirn usbirn subirn bisurn ibsurn bsiurn sbiurn isburn siburn uisbrn iusbrn usibrn suibrn isubrn siubrn brisun rbisun birsun ibrsun ribsun irbsun brsiun rbsiun bsriun sbriun rsbiun srbiun bisrun ibsrun bsirun sbirun isbrun sibrun risbun irsbun rsibun sribun isrbun sirbun urisbn ruisbn uirsbn iursbn riusbn irusbn ursibn rusibn usribn suribn rsuibn sruibn uisrbn iusrbn usirbn suirbn isurbn siurbn risubn irsubn rsiubn sriubn isrubn sirubn burnsi ubrnsi brunsi rbunsi urbnsi rubnsi bunrsi ubnrsi bnursi nbursi unbrsi nubrsi brnusi rbnusi bnrusi nbrusi rnbusi nrbusi urnbsi runbsi unrbsi nurbsi rnubsi nrubsi bursni ubrsni brusni rbusni urbsni rubsni busrni ubsrni bsurni sburni usbrni subrni brsuni rbsuni bsruni sbruni rsbuni srbuni ursbni rusbni usrbni surbni rsubni srubni bunsri ubnsri bnusri nbusri unbsri nubsri busnri ubsnri bsunri sbunri usbnri subnri bnsuri nbsuri bsnuri sbnuri nsburi snburi unsbri nusbri usnbri sunbri nsubri snubri brnsui rbnsui bnrsui nbrsui rnbsui nrbsui brsnui rbsnui bsrnui sbrnui rsbnui srbnui bnsrui nbsrui bsnrui sbnrui nsbrui snbrui rnsbui nrsbui rsnbui srnbui nsrbui snrbui urnsbi runsbi unrsbi nursbi rnusbi nrusbi ursnbi rusnbi usrnbi surnbi rsunbi srunbi unsrbi nusrbi usnrbi sunrbi nsurbi snurbi rnsubi nrsubi rsnubi srnubi nsrubi snrubi buinsr ubinsr biunsr ibunsr uibnsr iubnsr bunisr ubnisr bnuisr nbuisr unbisr nubisr binusr ibnusr bniusr nbiusr inbusr nibusr uinbsr iunbsr unibsr nuibsr inubsr niubsr buisnr ubisnr biusnr ibusnr uibsnr iubsnr businr ubsinr bsuinr sbuinr usbinr subinr bisunr ibsunr bsiunr sbiunr isbunr sibunr uisbnr iusbnr usibnr suibnr isubnr siubnr bunsir ubnsir bnusir nbusir unbsir nubsir busnir ubsnir bsunir sbunir usbnir subnir bnsuir nbsuir bsnuir sbnuir nsbuir snbuir unsbir nusbir usnbir sunbir nsubir snubir binsur ibnsur bnisur nbisur inbsur nibsur bisnur ibsnur bsinur sbinur isbnur sibnur bnsiur nbsiur bsniur sbniur nsbiur snbiur insbur nisbur isnbur sinbur nsibur snibur uinsbr iunsbr unisbr nuisbr inusbr niusbr uisnbr iusnbr usinbr suinbr isunbr siunbr unsibr nusibr usnibr sunibr nsuibr snuibr insubr nisubr isnubr sinubr nsiubr sniubr brinsu rbinsu birnsu ibrnsu ribnsu irbnsu brnisu rbnisu bnrisu nbrisu rnbisu nrbisu binrsu ibnrsu bnirsu nbirsu inbrsu nibrsu rinbsu irnbsu rnibsu nribsu inrbsu nirbsu brisnu rbisnu birsnu ibrsnu ribsnu irbsnu brsinu rbsinu bsrinu sbrinu rsbinu srbinu bisrnu ibsrnu bsirnu sbirnu isbrnu sibrnu risbnu irsbnu rsibnu sribnu isrbnu sirbnu brnsiu rbnsiu bnrsiu nbrsiu rnbsiu nrbsiu brsniu rbsniu bsrniu sbrniu rsbniu srbniu bnsriu nbsriu bsnriu sbnriu nsbriu snbriu rnsbiu nrsbiu rsnbiu srnbiu nsrbiu snrbiu binsru ibnsru bnisru nbisru inbsru nibsru bisnru ibsnru bsinru sbinru isbnru sibnru bnsiru nbsiru bsniru sbniru nsbiru snbiru insbru nisbru isnbru sinbru nsibru snibru rinsbu irnsbu rnisbu nrisbu inrsbu nirsbu risnbu irsnbu rsinbu srinbu isrnbu sirnbu rnsibu nrsibu rsnibu srnibu nsribu snribu insrbu nisrbu isnrbu sinrbu nsirbu snirbu urinsb ruinsb uirnsb iurnsb riunsb irunsb urnisb runisb unrisb nurisb rnuisb nruisb uinrsb iunrsb unirsb nuirsb inursb niursb rinusb irnusb rniusb nriusb inrusb nirusb urisnb ruisnb uirsnb iursnb riusnb irusnb ursinb rusinb usrinb surinb rsuinb sruinb uisrnb iusrnb usirnb suirnb isurnb siurnb risunb irsunb rsiunb sriunb isrunb sirunb urnsib runsib unrsib nursib rnusib nrusib ursnib rusnib usrnib surnib rsunib srunib unsrib nusrib usnrib sunrib nsurib snurib rnsuib nrsuib rsnuib srnuib nsruib snruib uinsrb iunsrb unisrb nuisrb inusrb niusrb uisnrb iusnrb usinrb suinrb isunrb siunrb unsirb nusirb usnirb sunirb nsuirb snuirb insurb nisurb isnurb sinurb nsiurb sniurb rinsub irnsub rnisub nrisub inrsub nirsub risnub irsnub rsinub srinub isrnub sirnub rnsiub nrsiub rsniub srniub nsriub snriub insrub nisrub isnrub sinrub nsirub snirub
Note: these 'words' (valid or invalid) are all the permutations of the word burins. These words are obtained by scrambling the letters in burins.