switch wsitch siwtch iswtch wistch iwstch swtich wstich stwich tswich wtsich twsich sitwch istwch stiwch tsiwch itswch tiswch witsch iwtsch wtisch twisch itwsch tiwsch swicth wsicth siwcth iswcth wiscth iwscth swcith wscith scwith cswith wcsith cwsith sicwth iscwth sciwth csiwth icswth ciswth wicsth iwcsth wcisth cwisth icwsth ciwsth swtcih wstcih stwcih tswcih wtscih twscih swctih wsctih scwtih cswtih wcstih cwstih stcwih tscwih sctwih cstwih tcswih ctswih wtcsih twcsih wctsih cwtsih tcwsih ctwsih sitcwh istcwh sticwh tsicwh itscwh tiscwh sictwh isctwh scitwh csitwh icstwh cistwh stciwh tsciwh sctiwh cstiwh tcsiwh ctsiwh itcswh ticswh ictswh citswh tciswh ctiswh witcsh iwtcsh wticsh twicsh itwcsh tiwcsh wictsh iwctsh wcitsh cwitsh icwtsh ciwtsh wtcish twcish wctish cwtish tcwish ctwish itcwsh ticwsh ictwsh citwsh tciwsh ctiwsh swithc wsithc siwthc iswthc wisthc iwsthc swtihc wstihc stwihc tswihc wtsihc twsihc sitwhc istwhc stiwhc tsiwhc itswhc tiswhc witshc iwtshc wtishc twishc itwshc tiwshc swihtc wsihtc siwhtc iswhtc wishtc iwshtc swhitc wshitc shwitc hswitc whsitc hwsitc sihwtc ishwtc shiwtc hsiwtc ihswtc hiswtc wihstc iwhstc whistc hwistc ihwstc hiwstc swthic wsthic stwhic tswhic wtshic twshic swhtic wshtic shwtic hswtic whstic hwstic sthwic tshwic shtwic hstwic thswic htswic wthsic twhsic whtsic hwtsic thwsic htwsic sithwc isthwc stihwc tsihwc itshwc tishwc sihtwc ishtwc shitwc hsitwc ihstwc histwc sthiwc tshiwc shtiwc hstiwc thsiwc htsiwc ithswc tihswc ihtswc hitswc thiswc htiswc withsc iwthsc wtihsc twihsc itwhsc tiwhsc wihtsc iwhtsc whitsc hwitsc ihwtsc hiwtsc wthisc twhisc whtisc hwtisc thwisc htwisc ithwsc tihwsc ihtwsc hitwsc thiwsc htiwsc swicht wsicht siwcht iswcht wischt iwscht swciht wsciht scwiht cswiht wcsiht cwsiht sicwht iscwht sciwht csiwht icswht ciswht wicsht iwcsht wcisht cwisht icwsht ciwsht swihct wsihct siwhct iswhct wishct iwshct swhict wshict shwict hswict whsict hwsict sihwct ishwct shiwct hsiwct ihswct hiswct wihsct iwhsct whisct hwisct ihwsct hiwsct swchit wschit scwhit cswhit wcshit cwshit swhcit wshcit shwcit hswcit whscit hwscit schwit cshwit shcwit hscwit chswit hcswit wchsit cwhsit whcsit hwcsit chwsit hcwsit sichwt ischwt scihwt csihwt icshwt cishwt sihcwt ishcwt shicwt hsicwt ihscwt hiscwt schiwt cshiwt shciwt hsciwt chsiwt hcsiwt ichswt cihswt ihcswt hicswt chiswt hciswt wichst iwchst wcihst cwihst icwhst ciwhst wihcst iwhcst whicst hwicst ihwcst hiwcst wchist cwhist whcist hwcist chwist hcwist ichwst cihwst ihcwst hicwst chiwst hciwst swtchi wstchi stwchi tswchi wtschi twschi swcthi wscthi scwthi cswthi wcsthi cwsthi stcwhi tscwhi sctwhi cstwhi tcswhi ctswhi wtcshi twcshi wctshi cwtshi tcwshi ctwshi swthci wsthci stwhci tswhci wtshci twshci swhtci wshtci shwtci hswtci whstci hwstci sthwci tshwci shtwci hstwci thswci htswci wthsci twhsci whtsci hwtsci thwsci htwsci swchti wschti scwhti cswhti wcshti cwshti swhcti wshcti shwcti hswcti whscti hwscti schwti cshwti shcwti hscwti chswti hcswti wchsti cwhsti whcsti hwcsti chwsti hcwsti stchwi tschwi scthwi csthwi tcshwi ctshwi sthcwi tshcwi shtcwi hstcwi thscwi htscwi schtwi cshtwi shctwi hsctwi chstwi hcstwi tchswi cthswi thcswi htcswi chtswi hctswi wtchsi twchsi wcthsi cwthsi tcwhsi ctwhsi wthcsi twhcsi whtcsi hwtcsi thwcsi htwcsi wchtsi cwhtsi whctsi hwctsi chwtsi hcwtsi tchwsi cthwsi thcwsi htcwsi chtwsi hctwsi sitchw istchw stichw tsichw itschw tischw sicthw iscthw scithw csithw icsthw cisthw stcihw tscihw sctihw cstihw tcsihw ctsihw itcshw ticshw ictshw citshw tcishw ctishw sithcw isthcw stihcw tsihcw itshcw tishcw sihtcw ishtcw shitcw hsitcw ihstcw histcw sthicw tshicw shticw hsticw thsicw htsicw ithscw tihscw ihtscw hitscw thiscw htiscw sichtw ischtw scihtw csihtw icshtw cishtw sihctw ishctw shictw hsictw ihsctw hisctw schitw cshitw shcitw hscitw chsitw hcsitw ichstw cihstw ihcstw hicstw chistw hcistw stchiw tschiw scthiw csthiw tcshiw ctshiw sthciw tshciw shtciw hstciw thsciw htsciw schtiw cshtiw shctiw hsctiw chstiw hcstiw tchsiw cthsiw thcsiw htcsiw chtsiw hctsiw itchsw tichsw icthsw cithsw tcihsw ctihsw ithcsw tihcsw ihtcsw hitcsw thicsw hticsw ichtsw cihtsw ihctsw hictsw chitsw hcitsw tchisw cthisw thcisw htcisw chtisw hctisw witchs iwtchs wtichs twichs itwchs tiwchs wicths iwcths wciths cwiths icwths ciwths wtcihs twcihs wctihs cwtihs tcwihs ctwihs itcwhs ticwhs ictwhs citwhs tciwhs ctiwhs withcs iwthcs wtihcs twihcs itwhcs tiwhcs wihtcs iwhtcs whitcs hwitcs ihwtcs hiwtcs wthics twhics whtics hwtics thwics htwics ithwcs tihwcs ihtwcs hitwcs thiwcs htiwcs wichts iwchts wcihts cwihts icwhts ciwhts wihcts iwhcts whicts hwicts ihwcts hiwcts wchits cwhits whcits hwcits chwits hcwits ichwts cihwts ihcwts hicwts chiwts hciwts wtchis twchis wcthis cwthis tcwhis ctwhis wthcis twhcis whtcis hwtcis thwcis htwcis wchtis cwhtis whctis hwctis chwtis hcwtis tchwis cthwis thcwis htcwis chtwis hctwis itchws tichws icthws cithws tcihws ctihws ithcws tihcws ihtcws hitcws thicws hticws ichtws cihtws ihctws hictws chitws hcitws tchiws cthiws thciws htciws chtiws hctiws
Note: these 'words' (valid or invalid) are all the permutations of the word switch. These words are obtained by scrambling the letters in switch.