hotrw ohtrw htorw thorw othrw tohrw hortw ohrtw hrotw rhotw orhtw rohtw htrow throw hrtow rhtow trhow rthow otrhw torhw orthw rothw trohw rtohw hotwr ohtwr htowr thowr othwr tohwr howtr ohwtr hwotr whotr owhtr wohtr htwor thwor hwtor whtor twhor wthor otwhr towhr owthr wothr twohr wtohr horwt ohrwt hrowt rhowt orhwt rohwt howrt ohwrt hwort whort owhrt wohrt hrwot rhwot hwrot whrot rwhot wrhot orwht rowht owrht worht rwoht wroht htrwo thrwo hrtwo rhtwo trhwo rthwo htwro thwro hwtro whtro twhro wthro hrwto rhwto hwrto whrto rwhto wrhto trwho rtwho twrho wtrho rwtho wrtho otrwh torwh ortwh rotwh trowh rtowh otwrh towrh owtrh wotrh tworh wtorh orwth rowth owrth worth rwoth wroth trwoh rtwoh twroh wtroh rwtoh wrtoh
Note: these 'words' (valid or invalid) are all the permutations of the word hotrw. These words are obtained by scrambling the letters in hotrw.