dumpy udmpy dmupy mdupy umdpy mudpy dupmy udpmy dpumy pdumy updmy pudmy dmpuy mdpuy dpmuy pdmuy mpduy pmduy umpdy mupdy upmdy pumdy mpudy pmudy dumyp udmyp dmuyp mduyp umdyp mudyp duymp udymp dyump ydump uydmp yudmp dmyup mdyup dymup ydmup mydup ymdup umydp muydp uymdp yumdp myudp ymudp dupym udpym dpuym pduym updym pudym duypm udypm dyupm ydupm uydpm yudpm dpyum pdyum dypum ydpum pydum ypdum upydm puydm uypdm yupdm pyudm ypudm dmpyu mdpyu dpmyu pdmyu mpdyu pmdyu dmypu mdypu dympu ydmpu mydpu ymdpu dpymu pdymu dypmu ydpmu pydmu ypdmu mpydu pmydu mypdu ympdu pymdu ypmdu umpyd mupyd upmyd pumyd mpuyd pmuyd umypd muypd uympd yumpd myupd ymupd upymd puymd uypmd yupmd pyumd ypumd mpyud pmyud mypud ympud pymud ypmud
Note: these 'words' (valid or invalid) are all the permutations of the word dumpy. These words are obtained by scrambling the letters in dumpy.