cover ocver cvoer vcoer ovcer vocer coevr ocevr ceovr ecovr oecvr eocvr cveor vceor cevor ecvor vecor evcor ovecr voecr oevcr eovcr veocr evocr covre ocvre cvore vcore ovcre vocre corve ocrve crove rcove orcve rocve cvroe vcroe crvoe rcvoe vrcoe rvcoe ovrce vorce orvce rovce vroce rvoce coerv ocerv ceorv ecorv oecrv eocrv corev ocrev croev rcoev orcev rocev cerov ecrov creov rceov ercov recov oercv eorcv orecv roecv erocv reocv cvero vcero cevro ecvro vecro evcro cvreo vcreo crveo rcveo vrceo rvceo cervo ecrvo crevo rcevo ercvo recvo verco evrco vreco rveco ervco revco overc voerc oevrc eovrc veorc evorc ovrec vorec orvec rovec vroec rvoec oervc eorvc orevc roevc erovc reovc veroc evroc vreoc rveoc ervoc revoc
Note: these 'words' (valid or invalid) are all the permutations of the word cover. These words are obtained by scrambling the letters in cover.