certy ecrty crety rcety ercty recty cetry ectry ctery tcery etcry tecry crtey rctey ctrey tcrey rtcey trcey ertcy retcy etrcy tercy rtecy trecy ceryt ecryt creyt rceyt ercyt recyt ceyrt ecyrt cyert ycert eycrt yecrt cryet rcyet cyret ycret rycet yrcet eryct reyct eyrct yerct ryect yrect cetyr ectyr cteyr tceyr etcyr tecyr ceytr ecytr cyetr ycetr eyctr yectr ctyer tcyer cyter ycter tycer ytcer etycr teycr eytcr yetcr tyecr ytecr crtye rctye ctrye tcrye rtcye trcye cryte rcyte cyrte ycrte rycte yrcte ctyre tcyre cytre yctre tycre ytcre rtyce tryce rytce yrtce tyrce ytrce ertyc retyc etryc teryc rteyc treyc erytc reytc eyrtc yertc ryetc yretc etyrc teyrc eytrc yetrc tyerc yterc rtyec tryec rytec yrtec tyrec ytrec
Note: these 'words' (valid or invalid) are all the permutations of the word certy. These words are obtained by scrambling the letters in certy.