ureqa rueqa uerqa eurqa reuqa eruqa urqea ruqea uqrea qurea rquea qruea ueqra euqra uqera quera equra qeura requa erqua rqeua qreua eqrua qerua ureaq rueaq ueraq euraq reuaq eruaq uraeq ruaeq uareq aureq raueq arueq uearq euarq uaerq auerq eaurq aeurq reauq erauq raeuq areuq earuq aeruq urqae ruqae uqrae qurae rquae qruae uraqe ruaqe uarqe aurqe rauqe aruqe uqare quare uaqre auqre qaure aqure rqaue qraue raque arque qarue aqrue ueqar euqar uqear quear equar qeuar ueaqr euaqr uaeqr aueqr eauqr aeuqr uqaer quaer uaqer auqer qauer aquer eqaur qeaur eaqur aequr qaeur aqeur reqau erqau rqeau qreau eqrau qerau reaqu eraqu raequ arequ earqu aerqu rqaeu qraeu raqeu arqeu qareu aqreu eqaru qearu eaqru aeqru qaeru aqeru
Note: these 'words' (valid or invalid) are all the permutations of the word ureqa. These words are obtained by scrambling the letters in ureqa.