lucid ulcid lcuid cluid uclid culid luicd ulicd liucd ilucd uilcd iulcd lciud cliud licud ilcud cilud iclud ucild cuild uicld iucld ciuld iculd lucdi ulcdi lcudi cludi ucldi culdi ludci uldci lduci dluci udlci dulci lcdui cldui ldcui dlcui cdlui dclui ucdli cudli udcli ducli cduli dculi luidc ulidc liudc iludc uildc iuldc ludic uldic lduic dluic udlic dulic liduc ilduc ldiuc dliuc idluc diluc uidlc iudlc udilc duilc idulc diulc lcidu clidu licdu ilcdu cildu icldu lcdiu cldiu ldciu dlciu cdliu dcliu lidcu ildcu ldicu dlicu idlcu dilcu cidlu icdlu cdilu dcilu idclu diclu ucidl cuidl uicdl iucdl ciudl icudl ucdil cudil udcil ducil cduil dcuil uidcl iudcl udicl duicl iducl diucl cidul icdul cdiul dciul idcul dicul
Note: these 'words' (valid or invalid) are all the permutations of the word lucid. These words are obtained by scrambling the letters in lucid.