dorrs odrrs drors rdors ordrs rodrs dorrs odrrs drors rdors ordrs rodrs drros rdros drros rdros rrdos rrdos orrds rords orrds rords rrods rrods dorsr odrsr drosr rdosr ordsr rodsr dosrr odsrr dsorr sdorr osdrr sodrr drsor rdsor dsror sdror rsdor srdor orsdr rosdr osrdr sordr rsodr srodr dorsr odrsr drosr rdosr ordsr rodsr dosrr odsrr dsorr sdorr osdrr sodrr drsor rdsor dsror sdror rsdor srdor orsdr rosdr osrdr sordr rsodr srodr drrso rdrso drrso rdrso rrdso rrdso drsro rdsro dsrro sdrro rsdro srdro drsro rdsro dsrro sdrro rsdro srdro rrsdo rrsdo rsrdo srrdo rsrdo srrdo orrsd rorsd orrsd rorsd rrosd rrosd orsrd rosrd osrrd sorrd rsord srord orsrd rosrd osrrd sorrd rsord srord rrsod rrsod rsrod srrod rsrod srrod
Note: these 'words' (valid or invalid) are all the permutations of the word dorrs. These words are obtained by scrambling the letters in dorrs.