roshi orshi rsohi srohi osrhi sorhi rohsi orhsi rhosi hrosi ohrsi horsi rshoi srhoi rhsoi hrsoi shroi hsroi oshri sohri ohsri hosri shori hsori rosih orsih rsoih sroih osrih sorih roish orish riosh irosh oirsh iorsh rsioh srioh risoh irsoh siroh isroh osirh soirh oisrh iosrh siorh isorh rohis orhis rhois hrois ohris horis roihs orihs riohs irohs oirhs iorhs rhios hrios rihos irhos hiros ihros ohirs hoirs oihrs iohrs hiors ihors rshio srhio rhsio hrsio shrio hsrio rsiho sriho risho irsho sirho isrho rhiso hriso rihso irhso hirso ihrso shiro hsiro sihro ishro hisro ihsro oshir sohir ohsir hosir shoir hsoir osihr soihr oishr ioshr siohr isohr ohisr hoisr oihsr iohsr hiosr ihosr shior hsior sihor ishor hisor ihsor
Note: these 'words' (valid or invalid) are all the permutations of the word roshi. These words are obtained by scrambling the letters in roshi.