ucasd cuasd uacsd aucsd causd acusd ucsad cusad uscad sucad csuad scuad uascd auscd usacd suacd asucd saucd casud acsud csaud scaud ascud sacud ucads cuads uacds aucds cauds acuds ucdas cudas udcas ducas cduas dcuas uadcs audcs udacs duacs aducs daucs cadus acdus cdaus dcaus adcus dacus ucsda cusda uscda sucda csuda scuda ucdsa cudsa udcsa ducsa cdusa dcusa usdca sudca udsca dusca sduca dsuca csdua scdua cdsua dcsua sdcua dscua uasdc ausdc usadc suadc asudc saudc uadsc audsc udasc duasc adusc dausc usdac sudac udsac dusac sduac dsuac asduc saduc adsuc dasuc sdauc dsauc casdu acsdu csadu scadu ascdu sacdu cadsu acdsu cdasu dcasu adcsu dacsu csdau scdau cdsau dcsau sdcau dscau asdcu sadcu adscu dascu sdacu dsacu
Note: these 'words' (valid or invalid) are all the permutations of the word ucasd. These words are obtained by scrambling the letters in ucasd.