grumpy rgumpy gurmpy ugrmpy rugmpy urgmpy grmupy rgmupy gmrupy mgrupy rmgupy mrgupy gumrpy ugmrpy gmurpy mgurpy umgrpy mugrpy rumgpy urmgpy rmugpy mrugpy umrgpy murgpy grupmy rgupmy gurpmy ugrpmy rugpmy urgpmy grpumy rgpumy gprumy pgrumy rpgumy prgumy guprmy ugprmy gpurmy pgurmy upgrmy pugrmy rupgmy urpgmy rpugmy prugmy uprgmy purgmy grmpuy rgmpuy gmrpuy mgrpuy rmgpuy mrgpuy grpmuy rgpmuy gprmuy pgrmuy rpgmuy prgmuy gmpruy mgpruy gpmruy pgmruy mpgruy pmgruy rmpguy mrpguy rpmguy prmguy mprguy pmrguy gumpry ugmpry gmupry mgupry umgpry mugpry gupmry ugpmry gpumry pgumry upgmry pugmry gmpury mgpury gpmury pgmury mpgury pmgury umpgry mupgry upmgry pumgry mpugry pmugry rumpgy urmpgy rmupgy mrupgy umrpgy murpgy rupmgy urpmgy rpumgy prumgy uprmgy purmgy rmpugy mrpugy rpmugy prmugy mprugy pmrugy umprgy muprgy upmrgy pumrgy mpurgy pmurgy grumyp rgumyp gurmyp ugrmyp rugmyp urgmyp grmuyp rgmuyp gmruyp mgruyp rmguyp mrguyp gumryp ugmryp gmuryp mguryp umgryp mugryp rumgyp urmgyp rmugyp mrugyp umrgyp murgyp gruymp rguymp gurymp ugrymp rugymp urgymp gryump rgyump gyrump ygrump rygump yrgump guyrmp ugyrmp gyurmp ygurmp uygrmp yugrmp ruygmp urygmp ryugmp yrugmp uyrgmp yurgmp grmyup rgmyup gmryup mgryup rmgyup mrgyup grymup rgymup gyrmup ygrmup rygmup yrgmup gmyrup mgyrup gymrup ygmrup mygrup ymgrup rmygup mrygup rymgup yrmgup myrgup ymrgup gumyrp ugmyrp gmuyrp mguyrp umgyrp mugyrp guymrp ugymrp gyumrp ygumrp uygmrp yugmrp gmyurp mgyurp gymurp ygmurp mygurp ymgurp umygrp muygrp uymgrp yumgrp myugrp ymugrp rumygp urmygp rmuygp mruygp umrygp murygp ruymgp urymgp ryumgp yrumgp uyrmgp yurmgp rmyugp mryugp rymugp yrmugp myrugp ymrugp umyrgp muyrgp uymrgp yumrgp myurgp ymurgp grupym rgupym gurpym ugrpym rugpym urgpym grpuym rgpuym gpruym pgruym rpguym prguym guprym ugprym gpurym pgurym upgrym pugrym rupgym urpgym rpugym prugym uprgym purgym gruypm rguypm gurypm ugrypm rugypm urgypm gryupm rgyupm gyrupm ygrupm rygupm yrgupm guyrpm ugyrpm gyurpm ygurpm uygrpm yugrpm ruygpm urygpm ryugpm yrugpm uyrgpm yurgpm grpyum rgpyum gpryum pgryum rpgyum prgyum grypum rgypum gyrpum ygrpum rygpum yrgpum gpyrum pgyrum gyprum ygprum pygrum ypgrum rpygum prygum rypgum yrpgum pyrgum yprgum gupyrm ugpyrm gpuyrm pguyrm upgyrm pugyrm guyprm ugyprm gyuprm yguprm uygprm yugprm gpyurm pgyurm gypurm ygpurm pygurm ypgurm upygrm puygrm uypgrm yupgrm pyugrm ypugrm rupygm urpygm rpuygm pruygm uprygm purygm ruypgm urypgm ryupgm yrupgm uyrpgm yurpgm rpyugm pryugm rypugm yrpugm pyrugm yprugm upyrgm puyrgm uyprgm yuprgm pyurgm ypurgm grmpyu rgmpyu gmrpyu mgrpyu rmgpyu mrgpyu grpmyu rgpmyu gprmyu pgrmyu rpgmyu prgmyu gmpryu mgpryu gpmryu pgmryu mpgryu pmgryu rmpgyu mrpgyu rpmgyu prmgyu mprgyu pmrgyu grmypu rgmypu gmrypu mgrypu rmgypu mrgypu grympu rgympu gyrmpu ygrmpu rygmpu yrgmpu gmyrpu mgyrpu gymrpu ygmrpu mygrpu ymgrpu rmygpu mrygpu rymgpu yrmgpu myrgpu ymrgpu grpymu rgpymu gprymu pgrymu rpgymu prgymu grypmu rgypmu gyrpmu ygrpmu rygpmu yrgpmu gpyrmu pgyrmu gyprmu ygprmu pygrmu ypgrmu rpygmu prygmu rypgmu yrpgmu pyrgmu yprgmu gmpyru mgpyru gpmyru pgmyru mpgyru pmgyru gmypru mgypru gympru ygmpru mygpru ymgpru gpymru pgymru gypmru ygpmru pygmru ypgmru mpygru pmygru mypgru ympgru pymgru ypmgru rmpygu mrpygu rpmygu prmygu mprygu pmrygu rmypgu mrypgu rympgu yrmpgu myrpgu ymrpgu rpymgu prymgu rypmgu yrpmgu pyrmgu yprmgu mpyrgu pmyrgu myprgu ymprgu pymrgu ypmrgu gumpyr ugmpyr gmupyr mgupyr umgpyr mugpyr gupmyr ugpmyr gpumyr pgumyr upgmyr pugmyr gmpuyr mgpuyr gpmuyr pgmuyr mpguyr pmguyr umpgyr mupgyr upmgyr pumgyr mpugyr pmugyr gumypr ugmypr gmuypr mguypr umgypr mugypr guympr ugympr gyumpr ygumpr uygmpr yugmpr gmyupr mgyupr gymupr ygmupr mygupr ymgupr umygpr muygpr uymgpr yumgpr myugpr ymugpr gupymr ugpymr gpuymr pguymr upgymr pugymr guypmr ugypmr gyupmr ygupmr uygpmr yugpmr gpyumr pgyumr gypumr ygpumr pygumr ypgumr upygmr puygmr uypgmr yupgmr pyugmr ypugmr gmpyur mgpyur gpmyur pgmyur mpgyur pmgyur gmypur mgypur gympur ygmpur mygpur ymgpur gpymur pgymur gypmur ygpmur pygmur ypgmur mpygur pmygur mypgur ympgur pymgur ypmgur umpygr mupygr upmygr pumygr mpuygr pmuygr umypgr muypgr uympgr yumpgr myupgr ymupgr upymgr puymgr uypmgr yupmgr pyumgr ypumgr mpyugr pmyugr mypugr ympugr pymugr ypmugr rumpyg urmpyg rmupyg mrupyg umrpyg murpyg rupmyg urpmyg rpumyg prumyg uprmyg purmyg rmpuyg mrpuyg rpmuyg prmuyg mpruyg pmruyg umpryg mupryg upmryg pumryg mpuryg pmuryg rumypg urmypg rmuypg mruypg umrypg murypg ruympg urympg ryumpg yrumpg uyrmpg yurmpg rmyupg mryupg rymupg yrmupg myrupg ymrupg umyrpg muyrpg uymrpg yumrpg myurpg ymurpg rupymg urpymg rpuymg pruymg uprymg purymg ruypmg urypmg ryupmg yrupmg uyrpmg yurpmg rpyumg pryumg rypumg yrpumg pyrumg yprumg upyrmg puyrmg uyprmg yuprmg pyurmg ypurmg rmpyug mrpyug rpmyug prmyug mpryug pmryug rmypug mrypug rympug yrmpug myrpug ymrpug rpymug prymug rypmug yrpmug pyrmug yprmug mpyrug pmyrug myprug ymprug pymrug ypmrug umpyrg mupyrg upmyrg pumyrg mpuyrg pmuyrg umyprg muyprg uymprg yumprg myuprg ymuprg upymrg puymrg uypmrg yupmrg pyumrg ypumrg mpyurg pmyurg mypurg ympurg pymurg ypmurg
Note: these 'words' (valid or invalid) are all the permutations of the word grumpy. These words are obtained by scrambling the letters in grumpy.