troph rtoph torph otrph rotph ortph trpoh rtpoh tproh ptroh rptoh prtoh toprh otprh tporh ptorh optrh potrh ropth orpth rpoth proth oprth porth trohp rtohp torhp otrhp rothp orthp trhop rthop throp htrop rhtop hrtop tohrp othrp thorp htorp ohtrp hotrp rohtp orhtp rhotp hrotp ohrtp hortp trpho rtpho tprho ptrho rptho prtho trhpo rthpo thrpo htrpo rhtpo hrtpo tphro pthro thpro htpro phtro hptro rphto prhto rhpto hrpto phrto hprto tophr otphr tpohr ptohr opthr pothr tohpr othpr thopr htopr ohtpr hotpr tphor pthor thpor htpor phtor hptor ophtr pohtr ohptr hoptr photr hpotr ropht orpht rpoht proht oprht porht rohpt orhpt rhopt hropt ohrpt horpt rphot prhot rhpot hrpot phrot hprot ophrt pohrt ohprt hoprt phort hport
Note: these 'words' (valid or invalid) are all the permutations of the word troph. These words are obtained by scrambling the letters in troph.